always set Return-Path and drop default Reply-To, fixes #3023

Closes #3023

Merge request studip/studip!2029

lib/classes/ForumBulkMail.php

@@ -94,8 +94,7 @@ class ForumBulkMail extends messaging
                     $mail->addRecipient($to, get_fullname($user_id), 'Bcc');
                 }
 
-                $mail->setReplyToEmail('')
-                ->setBodyText($data['text']);
+                $mail->setBodyText($data['text']);
 
                 if (mb_strlen($data['reply_to'])) {
                     $mail->setSenderEmail($data['reply_to']);

lib/classes/StudipMail.class.php

@@ -69,6 +69,16 @@ class StudipMail
         return self::$transporter;
     }
 
+    /**
+     * Gets the configured abuse mail contact
+     *
+     * @return string
+     */
+    public static function getAbuseEmail()
+    {
+        return $GLOBALS['MAIL_ABUSE'] ?: "abuse@{$mail_localhost}";
+    }
+
     /**
      * convenience method for sending a qick, text based email message
      *
@@ -99,9 +109,8 @@ class StudipMail
     public static function sendAbuseMessage($subject, $text)
     {
         $mail = new StudipMail();
-        $abuse = $mail->getReplyToEmail();
+        $abuse = self::getAbuseEmail();
         return $mail->setSubject($subject)
-                    ->setReplyToEmail('')
                     ->addRecipient($abuse)
                     ->setBodyText($text)
                     ->send();
@@ -109,7 +118,7 @@ class StudipMail
 
     /**
      * sets some default values for sender and reply to from
-     * configuration settings. The return path is always set to MAIL_ABUSE
+     * configuration settings.
      *
      */
     public function __construct($data = null)
@@ -117,7 +126,6 @@ class StudipMail
         $mail_localhost = $GLOBALS['MAIL_LOCALHOST'] ?: $_SERVER['SERVER_NAME'];
         $this->setSenderEmail($GLOBALS['MAIL_ENV_FROM'] ?: "wwwrun@{$mail_localhost}");
         $this->setSenderName($GLOBALS['MAIL_FROM'] ?: 'Stud.IP - ' . Config::get()->UNI_NAME_CLEAN);
-        $this->setReplyToEmail($GLOBALS['MAIL_ABUSE'] ?: "abuse@{$mail_localhost}");
 
         if ($data) {
             $this->setData($data);
@@ -391,6 +399,7 @@ class StudipMail
             throw new Exception('no mail transport defined');
         }
         $transporter->ResetMessage();
+        $transporter->SetHeader('Return-Path', $this->getSenderEmail());
         $transporter->SetEncodedEmailHeader('From', $this->getSenderEmail(), self::quoteString($this->getSenderName()));
         if($this->getReplyToEmail()){
             $transporter->SetEncodedEmailHeader('Reply-To', $this->getReplyToEmail(), self::quoteString($this->getReplyToName()));

lib/messaging.inc.php

@@ -226,7 +226,6 @@ class messaging
         // Now, let us send the message
         $mail = new StudipMail();
         $mail->setSubject($title)
-            ->setReplyToEmail('')
             ->addRecipient($to, $rec_fullname)
             ->setBodyText($mailmessage);
         if (mb_strlen($reply_to)) {
@@ -236,8 +235,7 @@ class messaging
                     ->setSenderName(sprintf(_('Stud.IP für %s'), $snd_fullname));
             } else {
                 $mail->setSenderEmail($reply_to)
-                    ->setSenderName($snd_fullname)
-                    ->setReplyToEmail('');
+                    ->setSenderName($snd_fullname);
             }
         }
         $user_cfg = UserConfig::get($rec_user_id);

lib/phplib/Seminar_Register_Auth.class.php

@@ -214,7 +214,7 @@ class Seminar_Register_Auth extends Seminar_Auth
         $token  = Token::create(7 * 24 * 60 * 60, $user->id); // Link is valid for 1 week
         $url    = $GLOBALS['ABSOLUTE_URI_STUDIP'] . 'email_validation.php?secret=' . $token;
         $mail   = new StudipMail();
-        $abuse  = $mail->getReplyToEmail();
+        $abuse  = StudipMail::getAbuseEmail();
 
         $lang_path = getUserLanguagePath($user->id);