diff --git a/typo3/sysext/core/Classes/Mail/Mailer.php b/typo3/sysext/core/Classes/Mail/Mailer.php
index 4b99a9f..8386d21 100644
--- a/typo3/sysext/core/Classes/Mail/Mailer.php
+++ b/typo3/sysext/core/Classes/Mail/Mailer.php
@@ -17,6 +17,8 @@ namespace TYPO3\CMS\Core\Mail;
 // Make sure Swift's auto-loader is registered
 require_once PATH_typo3 . 'contrib/swiftmailer/lib/swift_required.php';
 
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
 /**
  * Adapter for Swift_Mailer to be used by TYPO3 extensions.
  *
@@ -57,6 +59,13 @@ class Mailer extends \Swift_Mailer {
 			}
 		}
 		parent::__construct($this->transport);
+
+		if (is_array($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['mail']['initializeMailer'])) {
+			$parameters = array();
+			foreach ($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['mail']['initializeMailer'] as $hookFunction) {
+				GeneralUtility::callUserFunction($hookFunction, $parameters, $this);
+			}
+		}
 	}
 
 	/**