{"id":87710,"date":"2026-01-07T13:37:51","date_gmt":"2026-01-07T13:37:51","guid":{"rendered":"https:\/\/mailrelay.com\/blog\/2026\/01\/07\/how-to-achieve-the-best-email-marketing-deliverability-with-mailrelay\/"},"modified":"2026-10-29T10:05:17","modified_gmt":"2026-10-29T10:05:17","slug":"how-to-achieve-the-best-email-marketing-deliverability-with-mailrelay","status":"publish","type":"post","link":"https:\/\/mailrelay.com\/en\/blog\/2026\/01\/07\/how-to-achieve-the-best-email-marketing-deliverability-with-mailrelay\/","title":{"rendered":"How to achieve the best email marketing deliverability in Spain with Mailrelay"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>In email marketing, the main thing is for your emails to reach the inbox.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Deliverability measures how many of your emails reach your subscribers&#8217; inboxes. <\/p>\n\n<p class=\"wp-block-paragraph\">In Spain, thousands of companies rely on email to communicate with their customers. <\/p>\n\n<p class=\"wp-block-paragraph\">However, some of the emails sent never reach the inbox because of spam filters and sender reputation problems.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Increasing that percentage will increase profits.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">In fact, email marketing still gets very good results in Spain.<\/p>\n\n<p class=\"wp-block-paragraph\">For example, industry studies tend to put the open rate in Spain above the global average.<\/p>\n\n<p class=\"wp-block-paragraph\">This shows that Spanish audiences respond very well to email marketing. <\/p>\n\n<p class=\"wp-block-paragraph\">So? <\/p>\n\n<p class=\"wp-block-paragraph\">Optimizing deliverability will usually bring <strong>higher open rates, more clicks and, ultimately, more conversions.<\/strong><\/p>\n\n\n<h2 class=\"wp-block-heading\">How to avoid landing in spam with bulk sending<\/h2>\n\n<p class=\"wp-block-paragraph\"><strong>Sending bulk emails<\/strong> doesn&#8217;t have to mean they end up in spam.<\/p>\n\n<p class=\"wp-block-paragraph\">You just have to follow some best practices, and volume won&#8217;t be a problem.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Get your subscribers&#8217; consent: <\/h3>\n\n<p class=\"wp-block-paragraph\">When you see the results email marketing can deliver, it&#8217;s easy to be tempted to buy an email list.<\/p>\n\n<p class=\"wp-block-paragraph\">Don&#8217;t do that.<\/p>\n\n<p class=\"wp-block-paragraph\">Don&#8217;t send emails to people who haven&#8217;t requested them. <\/p>\n\n<p class=\"wp-block-paragraph\">The best approach is to use clear subscription forms and double opt-in (email confirmation) to ensure each recipient really wants your content. <\/p>\n\n<p class=\"wp-block-paragraph\">If someone hasn&#8217;t told you &#8220;yes, I want to receive your emails,&#8221; don&#8217;t include them in your list; it&#8217;s that simple. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Without permission, any bulk sending, no matter how legal it seems, will be considered spam.<\/strong><\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Don&#8217;t buy email databases:<\/h3>\n\n<p class=\"wp-block-paragraph\">This expands a little on the previous point.<\/p>\n\n<p class=\"wp-block-paragraph\">Because it&#8217;s important.<\/p>\n\n<p class=\"wp-block-paragraph\">Purchased email lists will likely contain uninterested contacts, obsolete addresses (bounces) and even <a href=\"https:\/\/mailrelay.com\/en\/glossary\/spamtraps\/\" target=\"_blank\" rel=\"noreferrer noopener\">spam traps<\/a> <strong>(trap accounts used to detect spammers)<\/strong>. <\/p>\n\n<p class=\"wp-block-paragraph\">Cleaning these lists is an almost impossible task.<\/p>\n\n<p class=\"wp-block-paragraph\">So sending to these types of lists will skyrocket your bounces and complaints, damaging your domain reputation.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Many people mistakenly believe that a first send will clean these lists.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">The reality is that this first send can end up getting the sender domain onto <a href=\"https:\/\/mailrelay.com\/en\/glossary\/blacklist\/\" target=\"_blank\" rel=\"noreferrer noopener\">blacklists<\/a>.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Always include an unsubscribe link and legal details: <\/h3>\n\n<p class=\"wp-block-paragraph\">Every <a href=\"https:\/\/mailrelay.com\/en\/glossary\/newsletter\/\" target=\"_blank\" rel=\"noreferrer noopener\">newsletter<\/a> or promotional email you send must include an unsubscribe link.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Leaving it out is the easiest way to get it flagged as spam.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">This is also easy to do, as Mailrelay handles it automatically for you.<\/p>\n\n<p class=\"wp-block-paragraph\">Adding a legal notice is also highly recommended, something similar to what you have on your website, with your contact details.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Use a reliable and recognizable sender: <\/h3>\n\n<p class=\"wp-block-paragraph\">Always send from a professional email address on your own domain (for example, your_name@your_company.com). <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Avoid generic or suspicious senders like free addresses (Gmail, Yahoo) for bulk campaigns. <\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">They tend to get blocked.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Take care of content quality: <\/h3>\n\n<p class=\"wp-block-paragraph\"><strong>Anti-spam filters analyze the content of your emails. <\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">The texts, images, links, attachments, everything.<\/p>\n\n<p class=\"wp-block-paragraph\">There are some tips that might seem a bit old-fashioned:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Avoid words or phrases that could be considered \u201cspam\u201d<\/li>\n\n\n\n<li>Exaggerated offers (&#8220;Make money fast!&#8221;, &#8220;100% free now&#8221;)<\/li>\n\n\n\n<li>Excessive use of $ or \u20ac symbols<\/li>\n\n\n\n<li>Overuse of capital letters or exclamation marks<\/li>\n\n\n\n<li>Excessive caps, especially in the subject line<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>Does this mean that using these elements will land the email in spam? And that if you don&#8217;t use them, it will reach the inbox?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">It&#8217;s not that simple.<\/p>\n\n<p class=\"wp-block-paragraph\">But you can ask yourself: <strong>if I received this email, would it look like spam to me?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">The answer to this question will help you.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Simple design: <\/h3>\n\n<p class=\"wp-block-paragraph\">The most effective approach is usually not to overcomplicate things.<\/p>\n\n<p class=\"wp-block-paragraph\">A simple newsletter, which conveys the message directly, is usually the most effective.<\/p>\n\n<p class=\"wp-block-paragraph\">You have to consider that most recipients won&#8217;t have much time, so something brief is usually best.<\/p>\n\n<p class=\"wp-block-paragraph\">A complex, convoluted design that doesn&#8217;t make the goal clear usually performs worse.<\/p>\n\n<p class=\"wp-block-paragraph\">In any case, it&#8217;s recommended to run tests to adapt your strategy to your audience.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Send consistently, not all at once: <\/h3>\n\n<p class=\"wp-block-paragraph\">This is another point you have to be careful with.<\/p>\n\n<p class=\"wp-block-paragraph\">If you have never sent a bulk email campaign, suddenly sending to your entire list isn&#8217;t the best idea.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Why?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">There are several reasons:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Email providers have no history of sends from your domain, so they may be suspicious.<\/li>\n\n\n\n<li>If the list is getting outdated, it&#8217;s very possible that many emails will bounce, generate errors, etc.<\/li>\n\n\n\n<li>It&#8217;s also possible that contacts, if some time has passed without receiving emails from you, won&#8217;t remember subscribing and will flag you as spam<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">In short, a common mistake is accumulating a huge list and suddenly sending 100,000 emails at once after months of inactivity. <\/p>\n\n<p class=\"wp-block-paragraph\">These sudden spikes in volume can trigger alerts at providers (especially if you haven&#8217;t sent anything before). <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>It&#8217;s better to increase your volume gradually, and from then on keep a steady sending volume.<\/strong><\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Keep your contact list clean: <\/h3>\n\n<p class=\"wp-block-paragraph\">Keeping the contact list clean helps a lot to maintain good deliverability.<\/p>\n\n<p class=\"wp-block-paragraph\">If your contact list returns many bounces.<\/p>\n\n<p class=\"wp-block-paragraph\">Or you keep trying to send to those bounces.<\/p>\n\n<p class=\"wp-block-paragraph\">That sends a bad signal to the different <a href=\"https:\/\/mailrelay.com\/en\/glossary\/email-service-provider-esp\/\" target=\"_blank\" rel=\"noreferrer noopener\">ESPs<\/a>.<\/p>\n\n<p class=\"wp-block-paragraph\">The same goes if you receive a lot of spam complaints, or keep sending to addresses that asked to unsubscribe.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Mailrelay helps you keep your contact list clean by detecting bounces, managing unsubscribes, and handling spam complaints.<\/strong><\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"340\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/writing-and-sales-persuasion.jpg\" alt=\"Mailrelay interface: simple to use and powerful in features\" class=\"wp-image-87000\" style=\"aspect-ratio:2.4411764705882355;width:830px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/writing-and-sales-persuasion.jpg 830w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/writing-and-sales-persuasion-300x123.jpg 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/writing-and-sales-persuasion-768x315.jpg 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/writing-and-sales-persuasion-110x45.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/writing-and-sales-persuasion-60x25.jpg 60w\" sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">Mailrelay interface: simple to use and powerful in features<\/h2>\n\n<p class=\"wp-block-paragraph\">An easy-to-use email marketing tool saves you time and allows you to focus on the more creative parts.<\/p>\n\n<p class=\"wp-block-paragraph\">The Mailrelay dashboard is therefore very intuitive:<\/p>\n\n<figure class=\"wp-block-image is-resized size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"533\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/mailrelay-email-marketing-sencillo-panel-1024x533.png\" alt=\"Mailrelay, simple and powerful control panel\" class=\"wp-image-87074\" style=\"aspect-ratio:1.9212007504690432;width:1024px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/mailrelay-email-marketing-sencillo-panel-1024x533.png 1024w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/mailrelay-email-marketing-sencillo-panel-300x156.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/mailrelay-email-marketing-sencillo-panel-768x400.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/mailrelay-email-marketing-sencillo-panel-1536x800.png 1536w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/mailrelay-email-marketing-sencillo-panel-110x57.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/mailrelay-email-marketing-sencillo-panel-60x31.png 60w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/mailrelay-email-marketing-sencillo-panel.png 1608w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\"><strong>Why can this interface help you work better?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Mainly because the menus are organized logically, with some shortcuts for the most important actions.<\/p>\n\n<p class=\"wp-block-paragraph\">This way you don&#8217;t waste time looking for the menu you need.<\/p>\n\n<p class=\"wp-block-paragraph\">It also shows a general summary of the statistics for the latest email campaigns you have sent.<\/p>\n\n<p class=\"wp-block-paragraph\">From this main screen, by using shortcuts, you can:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Import contacts (for example from a CSV)<\/li>\n\n\n\n<li>Create a newsletter<\/li>\n\n\n\n<li>Create an automation<\/li>\n\n\n\n<li>Create a landing page<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">The rest of the actions can be carried out directly from the side menu, organized by themes\/categories.<\/p>\n\n<p class=\"wp-block-paragraph\">For example:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>From the subscribers menu:<\/strong> you can create groups, dynamic segments, custom fields, subscription forms and imports<\/li>\n\n\n\n<li><strong>In the newsletters menu:<\/strong> you can create your newsletter designs (and send them), RSS newsletters, senders and A\/B tests<\/li>\n\n\n\n<li><strong>Reports:<\/strong> reports on sent newsletters, automations, SMTP emails and your account plan statistics<\/li>\n\n\n\n<li><strong>Automations:<\/strong> where you can create different types of automations (sign-up, drip campaigns, etc.)<\/li>\n\n\n\n<li><strong>Landing pages:<\/strong> from this section you can create landing pages, insert forms in them and share them in your lead generation campaigns.<\/li>\n\n\n\n<li><strong>Media manager:<\/strong> lets you upload images to use in the design of your <a href=\"https:\/\/mailrelay.com\/en\/glossary\/newsletter\/\" target=\"_blank\" rel=\"noreferrer noopener\">newsletters<\/a><\/li>\n\n\n\n<li><strong>SMS:<\/strong> to <a href=\"https:\/\/mailrelay.com\/en\/sms\/\">create and manage SMS campaigns<\/a><\/li>\n\n\n\n<li><strong>WhatsApp:<\/strong> here you can create and manage WhatsApp message campaigns<\/li>\n\n\n\n<li><strong>Settings:<\/strong> in this important menu you&#8217;ll find, among other things, the general account settings (including the time zone), SMTP and API settings, event management and the wording of system emails (the emails sent when a contact signs up, etc.)<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">\u00b7 And what about the newsletter editor?<\/h3>\n\n<p class=\"wp-block-paragraph\">We will see this in more detail in the next sections.<\/p>\n\n<p class=\"wp-block-paragraph\">But it&#8217;s worth highlighting that the <a href=\"https:\/\/help.mailrelay.com\/es\/support\/solutions\/articles\/103000230444\" target=\"_blank\" rel=\"noreferrer noopener\">Mailrelay editor<\/a> includes AI capabilities, so not only can you save a lot of time writing your emails, but you can also avoid deliverability issues.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Why is this so?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Because the newsletter texts, as we have seen before, affect deliverability, and that&#8217;s why well-written texts will be more effective.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>If you don&#8217;t have time or experience, we recommend trying the Mailrelay AI newsletter assistant.<\/strong><\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"340\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/sales-grow.jpg\" alt=\"The state of email deliverability in Spain: figures and reality\" class=\"wp-image-86161\" style=\"aspect-ratio:2.4411764705882355;width:830px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/sales-grow.jpg 830w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/sales-grow-300x123.jpg 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/sales-grow-768x315.jpg 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/sales-grow-110x45.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/sales-grow-60x25.jpg 60w\" sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">The state of email deliverability in Spain: figures and reality<\/h2>\n\n<p class=\"wp-block-paragraph\">Deliverability is not a static measure that stays the same over time; quite the opposite, it adapts and reflects the measures that ESPs (such as Gmail, Outlook and Yahoo!) take against spam.<\/p>\n\n<p class=\"wp-block-paragraph\">Generally speaking, industry studies agree that some emails don&#8217;t reach the inbox.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>In other words, out of every 100 emails, some may end up in spam, bounce or not be delivered.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">But this is at a general level.<\/p>\n\n<p class=\"wp-block-paragraph\">Averages are like that: they don&#8217;t necessarily reflect the exact reality of each particular case, especially if you do things right.<\/p>\n\n<h3 class=\"wp-block-heading\">What is deliverability like in Spain today? <\/h3>\n\n<p class=\"wp-block-paragraph\">The truth is that the performance of email marketing campaigns has even improved in recent years.<\/p>\n\n<p class=\"wp-block-paragraph\">Industry studies tend to put the average campaign open rate in Spain above the global average.<\/p>\n\n<p class=\"wp-block-paragraph\">If we compare this data with other online marketing channels, such as SEM, SEO, social media, etc. We can observe that email marketing is much more effective.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>A good open rate usually indicates that emails are reaching the inbox.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">What can we consider a good deliverability rate?<\/p>\n\n<p class=\"wp-block-paragraph\">As a rough benchmark, a deliverability rate of 90% or higher is usually considered good.<\/p>\n\n<p class=\"wp-block-paragraph\">If it is lower, the reasons should be analyzed (email list, message, settings, etc.).<\/p>\n\n<p class=\"wp-block-paragraph\">Of course, the better this figure is, the better the campaign results will be.<\/p>\n\n<h3 class=\"wp-block-heading\">Gmail as the preferred email provider in Spain<\/h3>\n\n<p class=\"wp-block-paragraph\">This is another important factor to consider.<\/p>\n\n<p class=\"wp-block-paragraph\">Email providers.<\/p>\n\n<p class=\"wp-block-paragraph\">In Spain, Gmail dominates a large part of the market, followed by Outlook\/Hotmail and corporate services.<\/p>\n\n<p class=\"wp-block-paragraph\">Alright.<\/p>\n\n<p class=\"wp-block-paragraph\">These services are tightening their authentication and reputation requirements.<\/p>\n\n<p class=\"wp-block-paragraph\">We already covered this in the article on <a href=\"https:\/\/mailrelay.com\/en\/blog\/2025\/05\/03\/how-to-meet-outlook-gmail-and-yahoo-requirements-to-keep-your-emails-out-of-spam\/\" target=\"_blank\" rel=\"noreferrer noopener\">Gmail, Outlook and Yahoo&#8217;s anti-spam requirements<\/a>.<\/p>\n\n<p class=\"wp-block-paragraph\">But we can summarize some of these policies to refresh them here:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Google and Yahoo require configuring DMARC for sending to more than 5,000 contacts\/day<\/li>\n\n\n\n<li>Include a working unsubscribe link and keep your spam complaint rate below 0.3% <\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">What&#8217;s more, the volume of marketing emails sent in Spain keeps growing year after year.<\/p>\n\n<p class=\"wp-block-paragraph\">And as other online marketing tools continue to lose their effectiveness, this volume will keep growing.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Because companies need to run effective marketing campaigns that yield results.<\/strong><\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"340\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/analytics.jpg\" alt=\"SPF, DKIM, and DMARC: why you need to configure them (and how Mailrelay helps you)\" class=\"wp-image-86166\" style=\"aspect-ratio:2.4411764705882355;width:830px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/analytics.jpg 830w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/analytics-300x123.jpg 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/analytics-768x315.jpg 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/analytics-110x45.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/analytics-60x25.jpg 60w\" sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">SPF, DKIM, and DMARC: why you need to configure them (and how Mailrelay helps you)<\/h2>\n\n<p class=\"wp-block-paragraph\">If you want your emails to reach the inbox of Gmail, Outlook, and others, there is an essential aspect that can&#8217;t be ignored.<\/p>\n\n<p class=\"wp-block-paragraph\">SPF, DKIM, and DMARC settings.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>These three terms refer to email authentication protocols that serve to prove to destination servers that your messages are legitimate and actually come from your domain. <\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">That&#8217;s why they are so important.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 SPF (Sender Policy Framework): <\/h3>\n\n<p class=\"wp-block-paragraph\">It is a DNS record that tells receiving email servers which servers or IPs are authorized to send email on behalf of your domain. <\/p>\n\n<p class=\"wp-block-paragraph\">For example, if your domain is mycompany.com and you send emails using Mailrelay, in your SPF record you will indicate that Mailrelay servers can send emails on behalf of mycompany.com. <\/p>\n\n<p class=\"wp-block-paragraph\">When Gmail receives a message from you, it will check that SPF record; if it finds the sender&#8217;s IP there, it will trust the email more. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>On the other hand, if someone tries to impersonate you<\/strong> by sending from another unauthorized server, the SPF check will fail and the message will likely be rejected or marked as spam.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 DKIM (DomainKeys Identified Mail): <\/h3>\n\n<p class=\"wp-block-paragraph\">It&#8217;s like a digital signature. <\/p>\n\n<p class=\"wp-block-paragraph\">When you enable DKIM, your provider (Mailrelay, in this case) <strong>will include an encrypted signature in the header of every email you send<\/strong>. <\/p>\n\n<p class=\"wp-block-paragraph\">Receiving servers can verify that signature with the public key you publish in your DNS. <\/p>\n\n<p class=\"wp-block-paragraph\">If the signature matches, it means that the email content was not altered and that it was really sent by a server authorized by you. <\/p>\n\n<p class=\"wp-block-paragraph\">In short, DKIM guarantees the integrity and authenticity of the message.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 DMARC (Domain-based Message Authentication, Reporting &amp; Conformance): <\/h3>\n\n<p class=\"wp-block-paragraph\">This is the third pillar, and the most recent one. <\/p>\n\n<p class=\"wp-block-paragraph\">DMARC relies on SPF and DKIM: it allows specifying a policy on what to do if an email fails SPF\/DKIM. <\/p>\n\n<p class=\"wp-block-paragraph\">With DMARC, you as the sending domain tell receivers &#8220;reject emails that claim to be mycompany.com if they don&#8217;t pass SPF\/DKIM&#8221; or perhaps &#8220;send them to spam\/quarantine&#8221;. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Furthermore, DMARC requires that the From: address visible to the user matches the authenticated domain, avoiding spoofing tricks.<\/strong><\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Why are these settings essential for good deliverability?<\/h3>\n\n<p class=\"wp-block-paragraph\">Because without these settings, email providers will most likely reject the emails outright or leave them in the spam folder.<\/p>\n\n<p class=\"wp-block-paragraph\">It doesn&#8217;t matter if you send one email or thousands, these settings are necessary.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Without them, it&#8217;s not possible to know if your emails are really sent by you, or by anyone pretending to be you.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Therefore, they are settings that directly affect deliverability, since without them emails are much more likely to be marked as spam.<\/p>\n\n<p class=\"wp-block-paragraph\">Mailrelay not only lets you configure these settings, but also helps you check that they are always correct.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Just go to the Settings \u2013 Email authentication menu:<\/strong><\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"736\" height=\"517\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/configuraciones-para-email-marketing.png\" alt=\"email marketing settings\" class=\"wp-image-87094\" style=\"aspect-ratio:1.4235976789168279;width:736px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/configuraciones-para-email-marketing.png 736w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/configuraciones-para-email-marketing-300x211.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/configuraciones-para-email-marketing-110x77.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/configuraciones-para-email-marketing-60x42.png 60w\" sizes=\"auto, (max-width: 736px) 100vw, 736px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\"> If any setting isn&#8217;t correct, it shows you the changes that need to be made.<\/p>\n\n<p class=\"wp-block-paragraph\">And you would also find a link, which you can send to your domain provider so they can help you add these settings.<\/p>\n\n<p class=\"wp-block-paragraph\">Of course, our support team will also help you with these settings.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>It&#8217;s best not to send bulk emails without these settings; check them first.<\/strong><\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"340\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/online-marketing-engagement.jpg\" alt=\"Mailrelay editor, designed for the deliverability of your email campaigns\" class=\"wp-image-82830\" style=\"aspect-ratio:2.4411764705882355;width:830px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/online-marketing-engagement.jpg 830w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/online-marketing-engagement-300x123.jpg 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/online-marketing-engagement-768x315.jpg 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/online-marketing-engagement-110x45.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/online-marketing-engagement-60x25.jpg 60w\" sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">Mailrelay editor, designed for the deliverability of your email campaigns<\/h2>\n\n<p class=\"wp-block-paragraph\">The content of your emails affects deliverability, as we have been discussing.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>What can happen if the content of your emails resembles spam emails?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Well, basically this:<\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"886\" height=\"121\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/este-email-parece-spam.png\" alt=\"this email looks like spam\" class=\"wp-image-87099\" style=\"aspect-ratio:7.322314049586777;width:886px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/este-email-parece-spam.png 886w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/este-email-parece-spam-300x41.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/este-email-parece-spam-768x105.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/este-email-parece-spam-110x15.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/este-email-parece-spam-60x8.png 60w\" sizes=\"auto, (max-width: 886px) 100vw, 886px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">If the content of your emails looks like spam, it is quite likely that Gmail and others will categorize it as spam.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Simply because it looks like it.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">What things can make your email look like spam?<\/p>\n\n<ul class=\"wp-block-list\">\n<li>The email&#8217;s text (words, errors, overall topic\u2026)<\/li>\n\n\n\n<li>Errors in the HTML code<\/li>\n\n\n\n<li>Linked domains and URLs (if they are suspicious or on blacklists)<\/li>\n\n\n\n<li>Link shorteners (in some cases)<\/li>\n\n\n\n<li>Excessive use of images or lack of text (for example, if the email is simply an image)<\/li>\n\n\n\n<li>Recently created domain sending a large volume of emails<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>Is it understandable that you&#8217;d want to send an email that is just a single image?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Yes, of course, the problem is that, historically, spammers have done precisely that.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>So much so that email providers are suspicious of this practice.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Luckily, the Mailrelay editor helps you avoid these problems.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 How can the Mailrelay editor help you?<\/h3>\n\n<p class=\"wp-block-paragraph\">We&#8217;ll look at several ways; to start with, it can suggest subject lines using AI:<\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"909\" height=\"355\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asunto-utilizando-ia.png\" alt=\"subject line suggestion using ai\" class=\"wp-image-87105\" style=\"aspect-ratio:2.5605633802816903;width:909px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asunto-utilizando-ia.png 909w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asunto-utilizando-ia-300x117.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asunto-utilizando-ia-768x300.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asunto-utilizando-ia-110x43.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asunto-utilizando-ia-60x23.png 60w\" sizes=\"auto, (max-width: 909px) 100vw, 909px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">You just have to give it some basic instructions, such as the tone, the type of subject line and a brief description.<\/p>\n\n<p class=\"wp-block-paragraph\">With this data, it will suggest some options:<\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"895\" height=\"664\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asuntos-utilizando-ia.png\" alt=\"subject line suggestion using ai\" class=\"wp-image-87109\" style=\"aspect-ratio:1.3478915662650603;width:895px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asuntos-utilizando-ia.png 895w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asuntos-utilizando-ia-300x223.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asuntos-utilizando-ia-768x570.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asuntos-utilizando-ia-110x82.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/sugerencia-de-asuntos-utilizando-ia-60x45.png 60w\" sizes=\"auto, (max-width: 895px) 100vw, 895px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">They may not be the best subject lines in the world, but as a starting point they aren&#8217;t that bad.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>If you don&#8217;t have many ideas, use this tool to get suggestions.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">The subject line of your emails is very important.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>For the content, you can also use AI options:<\/strong><\/p>\n\n<figure class=\"wp-block-image is-resized size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"689\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-1024x689.png\" alt=\"email design via AI\" class=\"wp-image-87115\" style=\"aspect-ratio:1.486211901306241;width:1024px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-1024x689.png 1024w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-300x202.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-768x517.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-110x74.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-60x40.png 60w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA.png 1222w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">If you select this option, it will only be necessary to enter some basic information:<\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"902\" height=\"594\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-datos-basicos.png\" alt=\"AI email design: basic details\" class=\"wp-image-87119\" style=\"aspect-ratio:1.5185185185185186;width:902px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-datos-basicos.png 902w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-datos-basicos-300x198.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-datos-basicos-768x506.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-datos-basicos-110x72.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/diseno-de-emails-mediante-IA-datos-basicos-60x40.png 60w\" sizes=\"auto, (max-width: 902px) 100vw, 902px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">And the generated example would be something like this:<\/p>\n\n<figure class=\"wp-block-image is-resized size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"614\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/newsletter-de-ejemplo-creada-con-ia-1024x614.png\" alt=\"example newsletter created with ai\" class=\"wp-image-87124\" style=\"aspect-ratio:1.6677524429967427;width:1024px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/newsletter-de-ejemplo-creada-con-ia-1024x614.png 1024w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/newsletter-de-ejemplo-creada-con-ia-300x180.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/newsletter-de-ejemplo-creada-con-ia-768x461.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/newsletter-de-ejemplo-creada-con-ia-110x66.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/newsletter-de-ejemplo-creada-con-ia-60x36.png 60w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/newsletter-de-ejemplo-creada-con-ia.png 1105w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">It&#8217;s something very simple, yes, but you already have a base text to work with.<\/p>\n\n<p class=\"wp-block-paragraph\">The important thing is that if you decide to include several images, this base text will help ensure your email at least has some text, which is essential.<\/p>\n\n<p class=\"wp-block-paragraph\">From this base, you can start adding the elements you need:<\/p>\n\n<figure class=\"wp-block-image is-resized size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"598\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/bloques-de-elementos-de-una-newsletter-1024x598.png\" alt=\"newsletter element blocks\" class=\"wp-image-87129\" style=\"aspect-ratio:1.7123745819397993;width:1024px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/bloques-de-elementos-de-una-newsletter-1024x598.png 1024w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/bloques-de-elementos-de-una-newsletter-300x175.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/bloques-de-elementos-de-una-newsletter-768x449.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/bloques-de-elementos-de-una-newsletter-110x64.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/bloques-de-elementos-de-una-newsletter-60x35.png 60w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/bloques-de-elementos-de-una-newsletter.png 1392w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">You can add all kinds of blocks you need:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Text<\/li>\n\n\n\n<li>Image<\/li>\n\n\n\n<li>Button<\/li>\n\n\n\n<li>Dividers<\/li>\n\n\n\n<li>Spacers<\/li>\n\n\n\n<li>Navigation bars<\/li>\n\n\n\n<li>Social block<\/li>\n\n\n\n<li>Hero<\/li>\n\n\n\n<li>Video<\/li>\n\n\n\n<li>Product list (Woocommerce)<\/li>\n\n\n\n<li>Unsubscribe block<\/li>\n\n\n\n<li>Columns<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Adding them couldn&#8217;t be easier: just drag them wherever you want them.<\/p>\n\n<p class=\"wp-block-paragraph\">This editor generates correct HTML code so you don&#8217;t have problems with different email providers.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Since you don&#8217;t need to know or modify HTML, it&#8217;s not possible for you to make a mistake on this point.<\/strong><\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Spam rating and report<\/h3>\n\n<p class=\"wp-block-paragraph\">Before sending your newsletter, it&#8217;s useful to check for possible errors that could cause the email to be considered spam.<\/p>\n\n<p class=\"wp-block-paragraph\">You can find this report while editing the newsletter:<\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"588\" height=\"429\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spam-en-el-editor-de-newsletters.png\" alt=\"spam report in the newsletter editor\" class=\"wp-image-87138\" style=\"aspect-ratio:1.3706293706293706;width:588px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spam-en-el-editor-de-newsletters.png 588w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spam-en-el-editor-de-newsletters-300x219.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spam-en-el-editor-de-newsletters-110x80.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spam-en-el-editor-de-newsletters-60x44.png 60w\" sizes=\"auto, (max-width: 588px) 100vw, 588px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">This link will take you to a report on the newsletter content:<\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"890\" height=\"311\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spamassassin.png\" alt=\"spamassassin report\" class=\"wp-image-87142\" style=\"aspect-ratio:2.8617363344051445;width:890px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spamassassin.png 890w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spamassassin-300x105.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spamassassin-768x268.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spamassassin-110x38.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/informe-de-spamassassin-60x21.png 60w\" sizes=\"auto, (max-width: 890px) 100vw, 890px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">If you find any error message here, it would be advisable to fix it before sending.<\/p>\n\n<p class=\"wp-block-paragraph\">Of course, if you don&#8217;t know how to do it or have any questions, you can contact our support team so we can help you.<\/p>\n\n<p class=\"wp-block-paragraph\">This way you ensure that the newsletter content won&#8217;t harm deliverability.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 What is something you must avoid as much as possible when preparing your newsletter?<\/h3>\n\n<p class=\"wp-block-paragraph\">Avoid copying texts from Word documents or web pages.<\/p>\n\n<p class=\"wp-block-paragraph\">These texts usually have styles, HTML code, and even hidden links that can result in your email not looking as you expect, or even being categorized as spam.<\/p>\n\n<p class=\"wp-block-paragraph\">The recommendation is that if you don&#8217;t have much time to write your email, use the editor&#8217;s AI options to help you.<\/p>\n\n<figure class=\"wp-block-image is-resized size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"340\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/email-marketing-.jpg\" alt=\"Mailrelay's own IPs to improve deliverability\" class=\"wp-image-87147\" style=\"aspect-ratio:2.4411764705882355;width:830px;height:auto\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/email-marketing-.jpg 830w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/email-marketing--300x123.jpg 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/email-marketing--768x315.jpg 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/email-marketing--110x45.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/11\/email-marketing--60x25.jpg 60w\" sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">How Mailrelay protects deliverability: shared IPs, dedicated IPs and monitoring<\/h2>\n\n<p class=\"wp-block-paragraph\">Everything we&#8217;ve covered so far depends on you: your list, your content and your settings. But the provider&#8217;s infrastructure matters too.<\/p>\n\n<p class=\"wp-block-paragraph\">Every email you send goes out from an IP address, and email providers keep track of how each one behaves: whether it sends spam, gets a lot of complaints or has a lot of bounces.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Shared IPs by default<\/h3>\n\n<p class=\"wp-block-paragraph\">All Mailrelay accounts send from Mailrelay&#8217;s own IP ranges, shared among senders. These IPs are already warmed up and have a sending history, so you don&#8217;t have to start from scratch with a new IP that has no reputation.<\/p>\n\n<p class=\"wp-block-paragraph\">What&#8217;s more, Mailrelay is built entirely on its own in-house technology, so we control both the infrastructure and what is sent through it.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Automatic, continuous monitoring<\/h3>\n\n<p class=\"wp-block-paragraph\">The platform has monitoring systems that work automatically:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>They check whether any IP address has been added to a blacklist.<\/li>\n\n\n\n<li>They process spam complaints through integrations with email providers.<\/li>\n\n\n\n<li>They spread the load and absorb sending peaks, for example when you increase the sending speed from the dashboard.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">\u00b7 List cleaning and anti-spam policy<\/h3>\n\n<p class=\"wp-block-paragraph\">Mailrelay detects bounces and handles unsubscribes and spam complaints automatically, and includes automatic list cleaning on every plan.<\/p>\n\n<p class=\"wp-block-paragraph\">In addition, every account must comply with <a href=\"https:\/\/mailrelay.com\/en\/anti-spam-policy\/\">Mailrelay&#8217;s anti-spam policy<\/a>. This protects the reputation of all the senders who share an IP.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Dedicated IPs: when they make sense<\/h3>\n\n<p class=\"wp-block-paragraph\">If you send large volumes on a regular basis, or need your reputation not to depend on any other sender, you can get one or more dedicated IPs.<\/p>\n\n<p class=\"wp-block-paragraph\">In that case your reputation depends only on your own sending, and the IP needs a <a href=\"https:\/\/mailrelay.com\/en\/glossary\/ip-warming\/\">warm-up period (IP warming)<\/a> before you send your full volume.<\/p>\n\n<p class=\"wp-block-paragraph\">Dedicated IPs are purchased separately: 1 dedicated IP costs \u20ac600\/year, 8 IPs \u20ac3,360\/year and 32 IPs \u20ac7,680\/year. You&#8217;ll find all the details in <a href=\"https:\/\/mailrelay.com\/en\/more-email-marketing-services\/\">more Mailrelay services<\/a>.<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Aspect<\/th><th>Shared IP<\/th><th>Dedicated IP<\/th><\/tr><\/thead><tbody><tr><td>Reputation<\/td><td>Shared with other senders and looked after by the platform<\/td><td>Depends only on your own sending<\/td><\/tr><tr><td>Warm-up<\/td><td>Not needed: the IP already has a history<\/td><td>Required before sending your full volume<\/td><\/tr><tr><td>Who it is for<\/td><td>Most senders, including on the free account<\/td><td>Consistently high volumes or companies that want to isolate their reputation<\/td><\/tr><tr><td>Price<\/td><td>Included in every account<\/td><td>From \u20ac600\/year<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h3 class=\"wp-block-heading\">\u00b7 Critical campaigns<\/h3>\n\n<p class=\"wp-block-paragraph\">For especially important campaigns, the ESP consulting service lets a Mailrelay systems administrator monitor the sending and pause it if they detect any warning signs. You&#8217;ll also find it in <a href=\"https:\/\/mailrelay.com\/en\/more-email-marketing-services\/\">more Mailrelay services<\/a>.<\/p>\n\n<h2 class=\"wp-block-heading\">Everything is important for the deliverability of your emails<\/h2>\n\n<p class=\"wp-block-paragraph\">It is important to review all the points we have seen:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>The settings must be in place and configured correctly<\/li>\n\n\n\n<li>The list must be suitable, not too old, and made up of contacts who have requested the emails<\/li>\n\n\n\n<li>The content must be suitable, error-free and not look like spam<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">If any of these points are not met, it is possible that some of the emails you send end up in spam.<\/p>\n\n<p class=\"wp-block-paragraph\">That&#8217;s why if you have any questions, the best thing is to contact our support team so we can help you improve deliverability.<\/p>\n\n<h2 class=\"wp-block-heading\">Frequently asked questions about deliverability with Mailrelay<\/h2>\n\n<h3 class=\"wp-block-heading\">\u00b7 Does Mailrelay have better deliverability than SendGrid?<\/h3>\n\n<p class=\"wp-block-paragraph\">No provider can guarantee that every email reaches the inbox, because deliverability also depends on domain authentication, list quality and content.<\/p>\n\n<p class=\"wp-block-paragraph\">What Mailrelay provides is the infrastructure and the tools: its own IPs with automatic monitoring, SPF, DKIM and DMARC checks in the dashboard, automatic list cleaning and a spam report in the editor.<\/p>\n\n<p class=\"wp-block-paragraph\">If you&#8217;re comparing providers, our <a href=\"https:\/\/mailrelay.com\/en\/blog\/2020\/10\/29\/20-email-marketing-tools-to-boost-your-email-marketing-campaigns\/\" target=\"_blank\" rel=\"noreferrer noopener\">comparison of tools with the best deliverability<\/a> shows what each one offers. And <a href=\"https:\/\/mailrelay.com\/en\/blog\/2025\/11\/06\/how-to-choose-an-email-marketing-service-with-high-deliverability\/\" target=\"_blank\" rel=\"noreferrer noopener\">how to choose an email marketing service with high deliverability<\/a> covers what to look for before signing up.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Does Mailrelay use shared or dedicated IPs?<\/h3>\n\n<p class=\"wp-block-paragraph\">By default, all accounts send from Mailrelay&#8217;s shared IPs, which are already warmed up and monitored. If you need them, you can get dedicated IPs from \u20ac600\/year.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Can I check whether my emails might go to spam before sending them?<\/h3>\n\n<p class=\"wp-block-paragraph\">Yes. The Mailrelay editor includes a spam report that checks the newsletter content before sending. And in Settings \u203a Email authentication you can check whether SPF, DKIM and DMARC are set up correctly.<\/p>\n\n<div class=\"wp-block-group has-very-light-gray-background-color has-background\" style=\"border-radius:8px;padding-top:24px;padding-right:28px;padding-bottom:24px;padding-left:28px\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-columns are-vertically-aligned-center is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-5dc627e1 wp-block-columns-is-layout-flex\" style=\"margin-top:0;margin-bottom:0\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:112px\">\n<figure class=\"wp-block-image size-full is-resized is-style-rounded\" style=\"margin-top:0;margin-bottom:0\"><a href=\"https:\/\/mailrelay.com\/en\/blog\/author\/jose\/\"><img loading=\"lazy\" decoding=\"async\" width=\"176\" height=\"176\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/10\/jose-argudo-cmo-mailrelay.jpg\" alt=\"Jose Argudo, CMO at Mailrelay\" class=\"wp-image-97284\" style=\"width:96px;height:96px\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/10\/jose-argudo-cmo-mailrelay.jpg 176w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/10\/jose-argudo-cmo-mailrelay-150x150.jpg 150w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/10\/jose-argudo-cmo-mailrelay-110x110.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/10\/jose-argudo-cmo-mailrelay-60x60.jpg 60w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/10\/jose-argudo-cmo-mailrelay-120x120.jpg 120w\" sizes=\"auto, (max-width: 176px) 100vw, 176px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\" style=\"margin-top:0;margin-bottom:4px\"><strong>Jose Argudo<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"margin-top:0;margin-bottom:4px\">CMO at Mailrelay. Writes about email marketing, copywriting, and conversion for small businesses and entrepreneurs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"margin-top:0;margin-bottom:0\"><a href=\"https:\/\/mailrelay.com\/en\/blog\/author\/jose\/\">More articles by Jose<\/a> \u00b7 <a href=\"https:\/\/www.linkedin.com\/in\/joseargudo\" target=\"_blank\" rel=\"noreferrer noopener\">LinkedIn<\/a><\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>In email marketing, the main thing is for your emails to reach the inbox. Deliverability measures how many of your emails reach your subscribers&#8217; inboxes. In Spain, thousands of companies rely on email to communicate with their customers. However, some of the emails sent never reach the inbox because of spam filters and sender reputation [&hellip;]<\/p>\n","protected":false},"author":124,"featured_media":87154,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[882,562],"tags":[],"class_list":["post-87710","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-deliverability-and-technical-aspects","category-email-marketing-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to achieve the best email deliverability in Spain<\/title>\n<meta name=\"description\" content=\"How to improve your email marketing deliverability in Spain: legal bulk sending, properly configured SPF, DKIM and DMARC, and fewer emails in spam.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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