{"id":91127,"date":"2026-01-27T13:27:00","date_gmt":"2026-01-27T13:27:00","guid":{"rendered":"https:\/\/mailrelay.com\/blog\/2026\/08\/20\/professional-smtp-and-api-for-transactional-emails-with-statistics\/"},"modified":"2026-08-20T16:10:03","modified_gmt":"2026-08-20T16:10:03","slug":"professional-smtp-and-api-for-transactional-emails-with-statistics","status":"publish","type":"post","link":"https:\/\/mailrelay.com\/en\/blog\/2026\/01\/27\/professional-smtp-and-api-for-transactional-emails-with-statistics\/","title":{"rendered":"Professional SMTP and API for Transactional Emails with Statistics"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Sending and delivering transactional emails calls for powerful, reliable email marketing platforms.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>These transactional emails need to be delivered quickly and effectively.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">That&#8217;s because of their very nature, since they&#8217;re usually important emails tied to user actions (purchases, sign-ups, notifications, etc.).<\/p>\n\n<p class=\"wp-block-paragraph\">In this article, we&#8217;ll look at the options Mailrelay offers for this type of email.<\/p>\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n<h2 class=\"wp-block-heading\">What are transactional emails and why do they matter?<\/h2>\n\n<p class=\"wp-block-paragraph\">Transactional emails are automated messages sent to a recipient after a specific action the user has taken. <\/p>\n\n<p class=\"wp-block-paragraph\">This could be a purchase, a sign-up, a password reset request, and so on.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>So they&#8217;re emails sent in response to a user action.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">As you can imagine, this type of email is key to any business.<\/p>\n\n<p class=\"wp-block-paragraph\">These messages usually have much higher open and click rates than a promotional email. <\/p>\n\n<p class=\"wp-block-paragraph\">The reason is obvious: the recipient is expecting these emails, unlike an unexpected mass email.<\/p>\n\n<p class=\"wp-block-paragraph\">That&#8217;s why it&#8217;s important for these emails to reach the <a href=\"https:\/\/mailrelay.com\/en\/glossary\/inbox\/\" target=\"_blank\" rel=\"noreferrer noopener\">inbox<\/a> as soon as possible.<\/p>\n\n<p class=\"wp-block-paragraph\">Mailrelay lets you send this type of email using either SMTP or the API.<\/p>\n\n<p class=\"wp-block-paragraph\">We&#8217;ll look at both options.<\/p>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"340\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2025\/09\/analytics.jpg\" alt=\"Professional SMTP: the foundation for sending transactional emails with confidence\" class=\"wp-image-86166\" 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\">Professional SMTP: the foundation for sending transactional emails with confidence<\/h2>\n\n<p class=\"wp-block-paragraph\">SMTP stands for <a href=\"https:\/\/mailrelay.com\/en\/glossary\/smtp-services\/\" target=\"_blank\" rel=\"noreferrer noopener\">Simple Mail Transfer Protocol<\/a>. <\/p>\n\n<p class=\"wp-block-paragraph\">It&#8217;s the standard protocol for sending emails over the Internet.<\/p>\n\n<p class=\"wp-block-paragraph\">When we talk about a \u201cprofessional SMTP server,\u201d we mean a dedicated service. <\/p>\n\n<p class=\"wp-block-paragraph\">It&#8217;s a service that relays your emails to the final recipient whenever the system you&#8217;re using requests it.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>What advantages does using an SMTP service have over other alternatives, like hosting?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">There are several advantages.<\/p>\n\n<p class=\"wp-block-paragraph\">To start with infrastructure, an SMTP service like Mailrelay&#8217;s has a server infrastructure, dedicated IPs, and staff specifically geared toward sending bulk and transactional emails.<\/p>\n\n<p class=\"wp-block-paragraph\">That&#8217;s not the case with other alternatives, like hosting.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>A solid infrastructure helps the deliverability of your email campaigns.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">So your emails reach their destination instead of the spam folder.<\/p>\n\n<p class=\"wp-block-paragraph\">On the other hand, an SMTP service can help you avoid sending to bounced addresses, being marked as spam, and so on. This helps keep your sender reputation intact.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>And what about sending volume?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">That&#8217;s another point to consider.<\/p>\n\n<p class=\"wp-block-paragraph\">Most alternatives, like the hosting we mentioned, aren&#8217;t built for sending bulk emails, so you may run into restrictions.<\/p>\n\n<p class=\"wp-block-paragraph\">Restrictions you wouldn&#8217;t run into with an SMTP service dedicated to sending emails.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Is it complicated to set up Mailrelay&#8217;s SMTP service?<\/h3>\n\n<p class=\"wp-block-paragraph\">Quite the opposite \u2014 it&#8217;s very simple to set up.<\/p>\n\n<p class=\"wp-block-paragraph\">In your Mailrelay account, go to <strong>Settings<\/strong> &#8211; <strong>SMTP Settings<\/strong> to activate the service and get your connection details.<\/p>\n\n<p class=\"wp-block-paragraph\">This screen will be very useful, since here you can:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>View the connection details<\/li>\n\n\n\n<li>Change the password<\/li>\n\n\n\n<li>Turn features on or off (like tracking for statistics)<\/li>\n\n\n\n<li>Find some code examples<\/li>\n\n\n\n<li>And if any errors occur, you&#8217;ll see them here too<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">As always, if you have any questions, you can contact our support team so we can help you.<\/p>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"341\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/email-marketing.jpg\" alt=\"Email API: flexible integration for transactional emails\" class=\"wp-image-82820\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/email-marketing.jpg 831w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/email-marketing-300x123.jpg 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/email-marketing-768x315.jpg 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/email-marketing-110x45.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/11\/email-marketing-60x25.jpg 60w\" sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">Email API: flexible integration for transactional emails<\/h2>\n\n<p class=\"wp-block-paragraph\">Besides the SMTP server, Mailrelay also offers a developer API that lets you send transactional emails.<\/p>\n\n<p class=\"wp-block-paragraph\">An API (Application Programming Interface) is a set of functions and endpoints. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>In simple terms, these are URLs you can call with requests for whatever you want to do.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">This lets your application communicate directly with Mailrelay.<\/p>\n\n<p class=\"wp-block-paragraph\">For example, you could use <a href=\"https:\/\/apidocs.mailrelay.com\/#post-\/send_emails\" target=\"_blank\" rel=\"noreferrer noopener\">Mailrelay API&#8217;s Send Emails function<\/a>.<\/p>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"684\" height=\"350\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/send_emails.png\" alt=\"send emails Mailrelay API\" class=\"wp-image-87807\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/send_emails.png 684w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/send_emails-300x154.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/send_emails-110x56.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/send_emails-60x31.png 60w\" sizes=\"auto, (max-width: 684px) 100vw, 684px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">This function lets you send a transactional email by specifying a few basic parameters:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>The sender<\/li>\n\n\n\n<li>The recipient<\/li>\n\n\n\n<li>Subject line<\/li>\n\n\n\n<li>Content<\/li>\n\n\n\n<li>And a few more optional fields<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">The API, just like SMTP, is a flexible way to add transactional email sending to your application.<\/p>\n\n<p class=\"wp-block-paragraph\">When a user performs a certain action (like creating an account, making a purchase, or requesting a change), your system sends a request to the API to immediately send the corresponding email.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>What&#8217;s the advantage of using the API?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">One of the most interesting is that you can customize each email to the max, making it unique for the recipient.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>It&#8217;s ideal for scenarios that call for highly tailored automation.<\/strong><\/p>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"340\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/04\/newsletter-editor.jpg\" alt=\"SMTP or API? When to use each option for your transactional emails\" class=\"wp-image-79397\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/04\/newsletter-editor.jpg 830w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/04\/newsletter-editor-300x123.jpg 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/04\/newsletter-editor-768x315.jpg 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/04\/newsletter-editor-110x45.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/04\/newsletter-editor-60x25.jpg 60w\" sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">SMTP or API? When to use each option for your transactional emails<\/h2>\n\n<p class=\"wp-block-paragraph\">Both options can be interchangeable in many scenarios.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>When is it better to send via SMTP, and when is it better to go with the API?<\/strong> <\/p>\n\n<p class=\"wp-block-paragraph\">Let&#8217;s try to sum it up.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 When to choose SMTP: <\/h3>\n\n<p class=\"wp-block-paragraph\">Using the SMTP server is simpler if you can&#8217;t do development work, or if you don&#8217;t have programming knowledge.<\/p>\n\n<p class=\"wp-block-paragraph\">For example, if you use desktop Outlook or Thunderbird, you can simply connect to Mailrelay&#8217;s SMTP, and the emails you send will go out through Mailrelay.<\/p>\n\n<p class=\"wp-block-paragraph\">It&#8217;s therefore a less technical solution that saves you time.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 When to choose the API: <\/h3>\n\n<p class=\"wp-block-paragraph\">If you have a development team or know how to code, and you need a more complete integration with your system or application, the API is usually the best solution.<\/p>\n\n<p class=\"wp-block-paragraph\">Using the API lets you not only send transactional emails, but also build a more complete integration between Mailrelay and your systems.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 You can use both options: <\/h3>\n\n<p class=\"wp-block-paragraph\">Of course, nothing stops you from using both options, or starting with one \u2014 SMTP, for example \u2014 while you develop the API integration.<\/p>\n\n<p class=\"wp-block-paragraph\">Mailrelay gives you both options, and you can use one or the other whenever you like.<\/p>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"340\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/sales-grow.jpg\" alt=\"Real-time tracking and statistics to optimize your transactional emails\" class=\"wp-image-78214\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/sales-grow.jpg 830w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/sales-grow-300x123.jpg 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/sales-grow-768x315.jpg 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/sales-grow-110x45.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/sales-grow-60x25.jpg 60w\" sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">Real-time tracking and statistics to optimize your transactional emails<\/h2>\n\n<p class=\"wp-block-paragraph\">It&#8217;s not just about sending emails \u2014 the <a href=\"https:\/\/mailrelay.com\/en\/blog\/2026\/08\/21\/real-time-email-statistics-discover-save-improve\/\" target=\"_blank\" rel=\"noreferrer noopener\">statistics<\/a> are essential.<\/p>\n\n<p class=\"wp-block-paragraph\">Mailrelay gives you several ways to get statistics on your transactional emails, whether sent via the API or SMTP.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Where can you see the statistics for SMTP emails sent with Mailrelay?<\/h3>\n\n<p class=\"wp-block-paragraph\">You can find this information in the <strong>Reports<\/strong> &#8211; <strong>SMTP Emails<\/strong> menu.<\/p>\n\n<p class=\"wp-block-paragraph\">On this screen you&#8217;ll find plenty of information:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Emails sent<\/li>\n\n\n\n<li>Their status<\/li>\n\n\n\n<li>Sender used<\/li>\n\n\n\n<li>Dates<\/li>\n\n\n\n<li>Whether they bounced, and the bounce category<\/li>\n\n\n\n<li>Whether they were marked as spam<\/li>\n\n\n\n<li>Or unsubscribed<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>But there&#8217;s more<\/strong>:<\/p>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"557\" height=\"327\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-de-emails-smtp.png\" alt=\"SMTP emails report\" class=\"wp-image-87817\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-de-emails-smtp.png 557w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-de-emails-smtp-300x176.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-de-emails-smtp-110x65.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-de-emails-smtp-60x35.png 60w\" sizes=\"auto, (max-width: 557px) 100vw, 557px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">You have two buttons: one for the <strong>report<\/strong>, and the other for <strong>rejected messages<\/strong>.<\/p>\n\n<p class=\"wp-block-paragraph\">The rejected messages button takes you to a report of the emails that weren&#8217;t accepted in the SMTP send, along with the reasons why.<\/p>\n\n<p class=\"wp-block-paragraph\">It&#8217;s a report that can help you fix sending errors, if there are any.<\/p>\n\n<p class=\"wp-block-paragraph\">The other button, <strong>report<\/strong>, takes you to a visual report of the SMTP sends you&#8217;ve made:<\/p>\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"550\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-visual-de-emails-smtp-1024x550.png\" alt=\"Visual report of SMTP emails\" class=\"wp-image-87822\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-visual-de-emails-smtp-1024x550.png 1024w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-visual-de-emails-smtp-300x161.png 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-visual-de-emails-smtp-768x412.png 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-visual-de-emails-smtp-110x59.png 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-visual-de-emails-smtp-60x32.png 60w, https:\/\/mailrelay.com\/wp-content\/uploads\/2026\/01\/informe-visual-de-emails-smtp.png 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">Let&#8217;s go over this image in a bit more detail in the following sections.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Open and click statistics for SMTP sends<\/h3>\n\n<p class=\"wp-block-paragraph\">One feature most email marketing tools don&#8217;t offer is open and click statistics for SMTP sends.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Mailrelay does offer these statistics.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">You just need to turn them on in the SMTP settings.<\/p>\n\n<p class=\"wp-block-paragraph\">Once you do, both opens and clicks will show up in the report above.<\/p>\n\n<p class=\"wp-block-paragraph\">There&#8217;s really nothing else to do: turn on the tracking option, send your emails as usual, and Mailrelay will take care of the rest.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 SMTP tags<\/h3>\n\n<p class=\"wp-block-paragraph\">Besides the statistics, you can also add <strong>tags<\/strong> to your SMTP sends.<\/p>\n\n<p class=\"wp-block-paragraph\">Tags let you tell your SMTP sends apart and filter them in the reports.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>How do you use SMTP tags?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">It&#8217;s very simple.<\/p>\n\n<p class=\"wp-block-paragraph\">First, turn it on in the <strong>Settings<\/strong> &#8211; <strong>SMTP Settings<\/strong> menu by activating <strong>tracking<\/strong>.<\/p>\n\n<p class=\"wp-block-paragraph\">Then, in your email subject lines, you can add a tag at the beginning:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>[X-MR-Tags: example]<\/strong><\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">That tag (which must be a single word, with no spaces) won&#8217;t be seen by the contacts who receive your emails \u2014 it&#8217;s only used by the system to let you filter in the reports.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 And via the API<\/h3>\n\n<p class=\"wp-block-paragraph\">If you use the API, you can also get the statistics thanks to the <a href=\"https:\/\/apidocs.mailrelay.com\/#get-\/smtp_emails\" target=\"_blank\" rel=\"noreferrer noopener\">Get SMTP Emails<\/a> endpoint.<\/p>\n\n<p class=\"wp-block-paragraph\">It doesn&#8217;t matter whether the transactional emails were sent via SMTP or the API \u2014 you can get them this way.<\/p>\n\n<p class=\"wp-block-paragraph\">With all these features, you can always stay on top of your transactional emails \u2014 whether they&#8217;re opened, whether they get clicked.<\/p>\n\n<p class=\"wp-block-paragraph\">Everything you need.<\/p>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"340\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/Marketing.jpg\" alt=\"Mailrelay vs. other platforms: The advantages of our transactional SMTP and API\" class=\"wp-image-78195\" srcset=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/Marketing.jpg 830w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/Marketing-300x123.jpg 300w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/Marketing-768x315.jpg 768w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/Marketing-110x45.jpg 110w, https:\/\/mailrelay.com\/wp-content\/uploads\/2024\/01\/Marketing-60x25.jpg 60w\" sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">Mailrelay vs. other platforms: The advantages of our transactional SMTP and API<\/h2>\n\n<p class=\"wp-block-paragraph\">There are many solutions on the market for sending transactional emails. <\/p>\n\n<p class=\"wp-block-paragraph\">From specialized services to well-known email marketing tools like Mailchimp, Mailjet, Brevo (Sendinblue), MailerLite, Acumbamail, or Klaviyo.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>What does Mailrelay offer to stand out among all these options?<\/strong><\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 A free plan far better than the competition&#8217;s: <\/h3>\n\n<p class=\"wp-block-paragraph\">Mailrelay&#8217;s free account lets you send up to 80,000 free emails a month, to a list of up to 20,000 contacts.<\/p>\n\n<p class=\"wp-block-paragraph\">And you can use SMTP and the API for this volume of emails.<\/p>\n\n<p class=\"wp-block-paragraph\">No other email marketing tool offers anything like this.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Dedicated technical support on every plan: <\/h3>\n\n<p class=\"wp-block-paragraph\">Mailrelay offers full support by email, chat, and phone.<\/p>\n\n<p class=\"wp-block-paragraph\">Always from staff who are experts in email marketing.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 Real-time statistics: <\/h3>\n\n<p class=\"wp-block-paragraph\">As we&#8217;ve seen, Mailrelay lets you do something most platforms don&#8217;t: <strong>get statistics on your transactional sends.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">A feature that&#8217;s also included in the free plan.<\/p>\n\n<h3 class=\"wp-block-heading\">\u00b7 High deliverability and reliability: <\/h3>\n\n<p class=\"wp-block-paragraph\">Thanks to our own infrastructure, Mailrelay achieves high delivery rates. <\/p>\n\n<p class=\"wp-block-paragraph\">This helps transactional emails reach recipients as quickly as possible. <\/p>\n\n<h2 class=\"wp-block-heading\">Try sending transactional emails with Mailrelay<\/h2>\n\n<p class=\"wp-block-paragraph\">Just create your free Mailrelay account and you&#8217;ll have access to all the options covered in this article.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>We hope this service comes in handy!<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sending and delivering transactional emails calls for powerful, reliable email marketing platforms. These transactional emails need to be delivered quickly and effectively. That&#8217;s because of their very nature, since they&#8217;re usually important emails tied to user actions (purchases, sign-ups, notifications, etc.). In this article, we&#8217;ll look at the options Mailrelay offers for this type of [&hellip;]<\/p>\n","protected":false},"author":124,"featured_media":87839,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[562],"tags":[],"class_list":["post-91127","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-email-marketing-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Professional SMTP and API for Transactional Emails with Statistics - Mailrelay<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mailrelay.com\/en\/blog\/2026\/01\/27\/professional-smtp-and-api-for-transactional-emails-with-statistics\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Professional SMTP and API for Transactional Emails with Statistics - Mailrelay\" \/>\n<meta property=\"og:description\" content=\"Sending and delivering transactional emails calls for powerful, reliable email marketing platforms. These transactional emails need to be delivered quickly and effectively. That&#8217;s because of their very nature, since they&#8217;re usually important emails tied to user actions (purchases, sign-ups, notifications, etc.). 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