Replace Zend Mail with PHPMailer (#15891)

* require composer package phpmailer/phpmailer

* change mail class to use phpmailer instead of Zend_Mail

* removes Zend_Mail and Zend_Mime

* submodule

* fix tests

* enable smtp debug for test mail command

* fix embedded images

* set language for phpmailer

* apply some review feedback

* removes Zend_Validate (#15907)

* don't inline file without cid

* submodule update

* fix test

* decouples Mail class from PHPMailer and moves sending mails to new transport layer

* submodule

* cleanup

* unset xmailer header

* simplify mail attachment handling

* adds methods to add bcc recipients

* change implementation of setReplyTo

1 files changed, 1 insertions, 0 deletions

diff --git a/plugins/CoreConsole/Commands/TestEmail.php b/plugins/CoreConsole/Commands/TestEmail.php
index 6eec81c48e..6d46704fd3 100644
--- a/plugins/CoreConsole/Commands/TestEmail.php
+++ b/plugins/CoreConsole/Commands/TestEmail.php
@@ -38,6 +38,7 @@ class TestEmail extends ConsoleCommand
         $subject = "This is a test email sent from $matomoUrl";
 
         $mail = new Mail();
+        $mail->setSmtpDebug(true);
         $mail->addTo($email, 'Matomo User');
         $mail->setFrom($config->General['noreply_email_address'], $config->General['noreply_email_name']);
         $mail->setSubject($subject);