Mail API

TYPO3 CMS provides a RFC-compliant mailing solution based on symfony/mailer for sending emails and symfony/mime for creating email messages.


Several settings are available in the Install Tool (“All Configuration”) affecting the sending process. The most important one is $GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport'], which can take the following values:


$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport'] = 'smtp';
Sends messages over SMTP. It can deal with encryption and authentication. Works exactly the same on Windows, Unix and MacOS. Requires a mail server and the following additional settings:
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_smtp_server'] = '<server:port>';
Mail server name and port to connect to. Port defaults to “25”.
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_smtp_encrypt'] = '<transport protocol>';
Connect to the server using the specified transport protocol. Requires openssl library. Usually available: ssl, sslv2, sslv3, tls. Check stream_get_transports().
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_smtp_username] = '<username>';
If your SMTP server requires authentication, the username.
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_smtp_password] = '<password>';
If your SMTP server requires authentication, the password.


$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport'] = 'smtp';
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_smtp_server'] = 'localhost';
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_smtp_encrypt'] = 'tls'; // ssl, sslv3, tls
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_smtp_username'] = 'johndoe';
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_smtp_password'] = 'cooLSecret';
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['defaultMailFromAddress'] = '';  // fetches all 'returning' emails


$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport'] = 'sendmail';
Sends messages by communicating with a locally installed MTA - such as sendmail. This may require setting the additional option:
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_sendmail_command'] = '<command>';

The command to call to send a mail locally. The default works on most modern UNIX based mail servers (sendmail, postfix, exim).


$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport'] = 'sendmail';
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_sendmail_command'] = '/usr/sbin/sendmail -bs';


$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport'] = 'mbox';
This doesn’t send any mail out, but instead will write every outgoing mail to a file adhering to the RFC 4155 mbox format, which is a simple text file where the mails are concatenated. Useful for debugging the mail sending process and on development machines which cannot send mails to the outside. The file to write to is defined by:
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_mbox_file'] = '</abs/path/to/mbox/file>';
The file where to write the mails into. Path must be absolute.


$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport'] = '<classname>';
Custom class which implements \Symfony\Component\Mailer\Transport\TransportInterface. The constructor receives all settings from the MAIL section to make it possible to add custom settings.

How to Create and Send Mails

This shows how to generate and send a mail in TYPO3:

// Create the message
$mail = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Mail\MailMessage::class);

// Prepare and send the message

   // Defining the "From" email address and name as an object
   // (email clients will display the name)
   ->from(new \Symfony\Component\Mime\Address('', 'John Doe'))

   // Set the "To" addresses
      new \Symfony\Component\Mime\Address('', 'Max Mustermann'),
      new \Symfony\Component\Mime\Address('')

   // Give the message a subject
   ->subject('Your subject')

   // Give it the text message
   ->text('Here is the message itself')

   // And optionally a HTML message
   ->html('<q>Here is the message itself</q>')

   // Optionally add any attachments

   // And finally send it

Or if you prefer, don’t concatenate the calls:

$mail = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Mail\MailMessage::class);
$mail->from(new \Symfony\Component\Mime\Address('', 'John Doe'));
   new \Symfony\Component\Mime\Address('', 'Max Mustermann'),
   new \Symfony\Component\Mime\Address('')
$mail->subject('Your subject');
$mail->text('Here is the message itself');
$mail->html('<q>Here is the message itself</q>');


Before TYPO3 v10 the MailMessage class only had methods like ->setTo(), setFrom(), ->setSubject() etc. Now the class inherits from \Symfony\Component\Mime\Email which provides the methods from the example. To make migration from older TYPO3 versions easier the previous methods still exist. The use of MailMessage in own extensions is recommended.

How to Add Attachments

Attach files that exist in your file system:

// Attach file to message

// Optionally you can tell email clients to display a custom name for the file
$mail->attachFromPath('/path/to/documents/privacy.pdf', 'Privacy Policy');

// Alternatively attach contents from a stream
$mail->attach(fopen('/path/to/documents/contract.doc', 'r'));

How to Add Inline Media

Add some inline media like images in a mail:

// Get the image contents from a PHP resource
$mail->embed(fopen('/path/to/images/logo.png', 'r'), 'logo');

// Get the image contents from an existing file
$mail->embedFromPath('/path/to/images/signature.png', 'footer-signature');

// reference images using the syntax 'cid:' + "image embed name"
$mail->html('<img src="cid:logo"> ... <img src="cid:footer-signature"> ...');

How to Set and Use a Default Sender

It is possible to define a default email sender (“From:”) in the Install Tool:

$GLOBALS['TYPO3_CONF_VARS']['MAIL']['defaultMailFromAddress'] = '';
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['defaultMailFromName'] = 'John Doe';

This is how you can use these defaults:

$from = \TYPO3\CMS\Core\Utility\MailUtility::getSystemFrom();

$mail = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Mail\MailMessage::class);

// As getSystemFrom() returns an array we need to use the setFrom method
// ...

In case of the problem “Mails are not sent” in your extension, try to set a ReturnPath:. Start as before but add:

// you will get a valid Email Adress from  'defaultMailFromAddress' or if not set from PHP settings or from system.
// if result is not a valid email, the final result will be
$returnPath = \TYPO3\CMS\Core\Utility\MailUtility::getSystemFromAddress();
if ($returnPath != "") {

Symfony Documentation

Please refer to the Symfony documentation for more information about available methods.