Feature: #90266 - Fluid-based email templating

Description

TYPO3 now supports sending template-based emails for multi-part and HTML-based emails out-of-the-box. The email contents are built with Fluid Templating Engine.

TYPO3's backend functionality already ships with a default layout for templated emails, which can be tested out in TYPO3's install tool test email functionality.

It is also possible to set a default mode for sending out emails via $GLOBALS['TYPO3_CONF_VARS']['MAIL']['format'] which can be both, plain or html.

This option can however overridden by Extension authors in their use cases.

All Fluid-based template paths can be configured via

LocalConfiguration.php:

where TYPO3 reserves all array keys below 100 for internal purposes. If you want to provide custom templates or layouts, set this in your LocalConfiguration.php / AdditionalConfiguration.php file:

In addition, it is possible to define a section within the Fluid template, which - if set - takes precedence over the subject() method.

Impact

TYPO3 now sends out templated messages for system emails in both plaintext and HTML format.

It is possible to use the same API in your custom extension like this:

$email = GeneralUtility::makeInstance(FluidEmail::class);
$email
    ->to('contact@acme.com')
    ->from(new Address('jeremy@acme.com', 'Jeremy'))
    ->subject('TYPO3 loves you - here is why')
    ->format('html') // only HTML mail
    ->setTemplate('TipsAndTricks')
    ->assign('mySecretIngredient', 'Tomato and TypoScript');
GeneralUtility::makeInstance(Mailer::class)->send($email);

Defining a custom email subject in a custom template:

<f:section name="Subject">New Login at "{typo3.sitename}"</f:section>

Building templated emails with Fluid also allows to define the language key, and use this within the Fluid template:

$email = GeneralUtility::makeInstance(FluidEmail::class);
$email
    ->to('contact@acme.com')
    ->assign('language', 'de');

<f:translate languageKey="{language}" id="LLL:my_ext/Resources/Private/Language/emails.xml:subject" />