diff --git a/include/class.mailer.php b/include/class.mailer.php
index 15a08d1df9657e576ea0d4b4c69fb803547d56ae..9a1f6dd5a45281cf0fe350be38a0c7d1f094a1a0 100644
--- a/include/class.mailer.php
+++ b/include/class.mailer.php
@@ -330,6 +330,9 @@ class Mailer {
 
                 $entry = null;
                 switch (true) {
+                case $recipients instanceof MailingList:
+                    $entry = $thread->getLastEmailMessage();
+                    break;
                 case $recipients instanceof TicketOwner:
                 case $recipients instanceof Collaborator:
                     $entry = $thread->getLastEmailMessage(array(