Integration of various email service providers in the Zend Framework Zend\Mail


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Created by Jurian Sluiman and Michaël Gallego

Note that API calls are not currently unit-tested (although we have properly test them manually). Therefore, you are encouraged to test your API usage before going into production.


SlmMail is a module that integrates with various third-parties API to send mails. Integration is provided with the API of those services. It does not handle SMTP.

Please note that SlmMail only supports Transactional services. Services for campaign marketing emails (like MailChimp or MailJet) are out-of-the scope of this module.

Here are the currently supported services:



Add "slm/mail" to your composer.json file and update your dependencies. Enable SlmMail in your application.config.php. To use one of the transport layers, see the documentation in the docs folder.

If you do not have a composer.json file in the root of your project, copy the contents below and put that into a file called composer.json and save it in the root of your project:

    "require": {
        "slm/mail": "~2.0"

Then execute the following commands in a CLI:

curl -s | php
php composer.phar install

Now you should have a vendor directory, including a slm/mail. In your bootstrap code, make sure you include the vendor/autoload.php file to properly load the SlmMail module.

Amazon SES

If you want to use Amazon SES, you need to install the official AWS ZF 2 module. Please refer to the documentation of Amazon SES in the docs folder.


Documentation for SlmMail is splitted for each provider:


How to send an HTML email ?

Every email providers used in SlmMail allow to send HTML emails. However, by default, if you set the mail's content using the setBody content, this content will be considered as the plain text version as shown below:

$message = new \Zend\Mail\Message();

// This will be considered as plain text message, even if the string is valid HTML code
$message->setBody('Hello world');

To send a HTML version, you must specify the body as a MimeMessage, and add the HTML version as a MIME part, as shown below:

$message = new \Zend\Mail\Message();

$htmlPart = new \Zend\Mime\Part('<html><body><h1>Hello world</h1></body></html>');
$htmlPart->type = "text/html";

$textPart = new \Zend\Mime\Part('Hello world');
$textPart->type = "text/plain";

$body = new \Zend\Mime\Message();
$body->setParts(array($textPart, $htmlPart));


For accessibility purposes, you should always provide both a text and HTML version of your mails.

How to configure HttpClient with http_options and http_adapter

By defaut the adapter is Zend\Http\Client\Adapter\Socket but you can override it with other adapter like this in your slm_mail.*.local.php

'slm_mail' => array(
        // Here your email service provider options

        'http_adapter' => 'Zend\Http\Client\Adapter\Proxy' // for example

If you want to change some options of your adapter please refer to you adapter class in var $config here and override these in your slm_mail.*.local.php like this :

'slm_mail' => array(
        // Here your email service provider options

        // example for Socket adapter
        'http_options' => array(
            'sslverifypeer' => false,
            'persistent' => true,

Which provider should I choose?

We won't answer you :-)! Each provider has their own set of features. You should carefully read each website to discover which one suits your needs best.

However, for convenience purpose, we have wrapped a pricing table for each email provider!