Transactional email service via SMTP and API

Send order confirmations, password resets and notifications from your website, store or app. Connect it via SMTP or with our API, and track every send in real time.

Send transactional emails with ease

How to send transactional emails with Mailrelay

Choose how to connect your website or app and start sending:

Send emails using SMTP

Send via SMTP

Add Mailrelay’s SMTP server details to your website, store or app, and start sending. No coding needed.

Our infrastructure, with our own servers and IPs, is built for bulk and transactional sending, so your emails reach their destination and not the spam folder.

Bounces, spam complaints and unsubscribes are handled automatically, so you don’t keep sending to addresses that hurt your sender reputation.

Or integrate it with our API

If your team develops, use the Mailrelay API to send transactional emails from your website, CRM or app.

It’s the most flexible option when you want to build sending into your own processes.

API documentation

<?php
$curl = curl_init();

curl_setopt_array($curl, [
    CURLOPT_URL => "https://youraccount/api/v1/send_emails", CURLOPT_RETURNTRANSFER => true, CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [ "x-auth-token: YOUR_API_KEY", "content-type: application/json" ],
    CURLOPT_POSTFIELDS => json_encode([
        "from" => [ "email" => "[email protected]", "name" => "Sender name" ],
        "to" => [ ["email" => "[email protected]", "name" => "Rcpt name"] ],
        "subject" => "My subject",
        "html_part" => "<p>Hello!</p>"
    ])
]);

$response = curl_exec($curl);

var_dump($response);
Transactional email effectiveness reports

Measure every send in real time

See which emails were delivered, which bounced and why, who marked them as spam and who unsubscribed.

Turn on tracking to also see opens and clicks, and add SMTP tags to the subject line to filter your reports by email type: orders, passwords or invoices.

What a transactional email service brings you

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Delivered when they need to be

A password reset or an order confirmation can’t be late. That’s why it’s best to send them from an infrastructure built for it, not from your website’s hosting.

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A clean list, effortlessly

Bounces, spam complaints and unsubscribes are handled automatically, so you protect your sender reputation.

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Stats for every send

Deliveries, bounces, opens and clicks in real time, including emails sent via SMTP.

Group

SMTP or API, your choice

Connect via SMTP without coding, or integrate the API if your team develops.

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Support from real people

Ticket support on every plan, chat from the Standard plan and phone support on Enterprise.

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Transactional and marketing in one account

Send your transactional emails and your newsletters from the same tool, with the same reports.

Person sending transactional emails from a laptop to customers, with order, password and notification emails marked as delivered

What transactional emails you can send

Any email that’s sent automatically after a customer takes an action. These are the most common:

Account icon

Account and security

Welcome after sign-up, email verification, password reset or login alert.

Orders icon

Orders and payments

Purchase confirmation, invoice, shipping notice or pending payment reminder. These are the emails your customers expect and look for.

Notifications icon

Notifications and reminders

Bookings, appointments, renewals or service changes, sent at just the right moment.

Some notifications can’t wait for the email to be opened? Combine them with SMS, and use email marketing for your newsletters and campaigns, all from the same account.

How much does the transactional email service cost?

Transactional emails via SMTP and API are included in the Standard and Enterprise plans. With the free account, you can try them for 30 days and then add them for €14.95 a month.

Frequently asked questions about the transactional email service

What is a transactional email service?

It’s a platform that sends the automatic emails from your website, store or app for you: confirmations, invoices, passwords or notifications. Your system passes each email to it via SMTP or API, and the service takes care of delivery and stats. You’ll find types and examples in our guide to transactional emails.

Which should I choose, SMTP or API?

If you can’t do any development, SMTP is the easiest option: you copy the server details into your app and start sending. If your team codes and you want to build sending into your processes, the API gives you more flexibility. We explain it in detail in SMTP and API for transactional emails.

Why not send them from my website’s server?

Because most hosting providers aren’t built to send volume and they set limits. Also, without proper bounce and complaint handling, your domain can end up in spam, and with it the emails your customers are waiting for.

Can I see whether my transactional emails are opened?

Yes. Turn on open and click tracking and you’ll see them in your reports, along with deliveries, bounces, complaints and unsubscribes. With SMTP tags in the subject line, you can separate invoices from passwords, for example.

Do I need a dedicated IP?

Not to get started. You send from Mailrelay’s infrastructure, which is already set up for it. If you send high volumes and want your reputation to depend only on your own sending, you can get a dedicated IP with annual billing.

Trusted by our customers

  • Mailrelay has allowed us to improve communication with our customers, build natural customer loyalty, and enhance our customer service. Offering a personal touch is one of our company’s hallmarks, and Mailrelay helps us achieve that effectively. We have received exquisite support at all times, and they have resolved all our inquiries in no time. I…
  • The Mailrelay system has been a solution to our marketing system, and the customer support was good, and fast. Customer support is also in Spanish, this enables more of our staff to make contact, the treatment is customized and they are connected throughout the working day, from 8-22 and give rapid assistance. You can send…
  • Mailrelay is an easy and efficient tool that has saved us a lot of time and internal IT and commercial resources that weused to have to consume. It allows us toadapt predesigned templates to our corporate style and we can send mailings with personalized fields instantly. It has helpedus with our client relationships.
  • We started using Mailrelay in early 2012 as part of an internal communications project and, after we saw that the system brought us good results,including design options, we ended up working with the software tocommunicate with the media and marketing actions. So far, we didn’t have any problems, even in the case of specificcampaigns, when…
  • By using Mailrelay, i try to send email marketing campaigns more Professional and with a more attractive design, and with this system I can measure the results of the strategies. Thanks to its statistical system I can sort and track our databases, see the analytical results of our campaigns, etc. Another improvement is the fact that this email…
  • Thanks to Mailrelay we can manage our own offers and exclusive packages, in a very agile way. In addition, the support offered by Noé, from the beginning was excellent, fast and effective. This helps us manage the system more easily. Without this help, we would have taken longer to learn how to manage the platform.

Start sending your transactional emails today

Create your free account, connect your website via SMTP or API and try the service for 30 days, no credit card required.