Transactional emails
Mailrelay’s powerful SMTP server lets you send transactional emails easily. We have a free account, so you can test it.


Sending emails using SMTP
Once you have created a free or paid account, you can enable the SMTP server. You will be able to see all the connection details (port, user, password, etc).
Send emails using our API
SMTP API allows you to send transactional emails to subscribers from your website, CRM, or other web applications.
<?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);

Email effectiveness reports
Measure email metrics regularly to improve your email marketing performance and ROI. All reports — on open and click-through rates, inbox placement, delivery rates and errors, and spam complaints — are available for download.
Immediate Benefits
Improved deliverability
Transactional emails tend to have higher deliverability rates than promotional emails, as they are sent in response to a specific user action and are thus expected by the recipient.
Customer Engagement
Transactional emails, such as order confirmations or shipping notifications, keep customers informed and engaged throughout their interaction with a company or service.
Increase trust and security
By sending transaction confirmations (like purchase confirmations or account changes), transactional emails help to build trust between the customer and the company.
Personalization and relevance
Transactional emails can be highly personalized and contain information that is relevant to the recipient. This increases the likelihood that the email will be opened and read.
Cross-selling Opportunities
While their primary purpose is not promotional, transactional emails can be an effective opportunity to subtly introduce other relevant products or services to the customer.
Analytics and Tracking
Transactional emails allow businesses to track key metrics, such as open and click rates, which helps to better understand customer behavior and continually improve communication strategy.
Trusted by our customers
Empower your business with reliable, personalized transactional emails.
Enjoy higher deliverability, enhanced customer engagement, and analytics.



