---
title: "Breaking: #105809 - AfterMailerInitializationEvent removed"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-105809-1733928218"
source: "Changelog/14.0/Breaking-105809-AfterMailerInitializationEventRemoved.rst"
typo3-version: "14.0"
typo3-major: 14
type: "breaking"
issue: 105809
forge: "https://forge.typo3.org/issues/105809"
tags: ["PHP-API", "FullyScanned", "ext:core"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Breaking: #105809 - AfterMailerInitializationEvent removed {#breaking-105809-1733928218}

See [forge#105809](https://forge.typo3.org/issues/105809)

## Description {#description}

The event `\TYPO3\CMS\Core\Mail\Event\AfterMailerInitializationEvent`
has been removed. This event became obsolete with the introduction of the
Symfony-based mailer in TYPO3 v10. It was only able to influence the TYPO3 Core
mailer by calling the `@internal` method `injectMailSettings()` *after*
the settings had already been determined. The event has been removed since it
no longer had a meaningful use case.

## Impact {#impact}

Event listeners registered for this event will no longer be triggered.

## Affected installations {#affected-installations}

This event has had little purpose since the switch to the Symfony-based mailer
and is probably not used in most instances. The extension scanner will find
usages.

## Migration {#migration}

Check if this event can be substituted by reconfiguring
`$GLOBALS['TYPO3_CONF_VARS']['MAIL']`, or by listening for the event
`BeforeMailerSentMessageEvent` instead.