diff --git a/email_handler.py b/email_handler.py
index 0a903bfa..2ff502b8 100644
--- a/email_handler.py
+++ b/email_handler.py
@@ -421,11 +421,10 @@ def handle_forward(envelope, smtp: SMTP, msg: Message, rcpt_to: str) -> (bool, s
 
     # Sometimes when user clicks on "reply all"
     # an email is sent to the same alias that the previous message is destined to
-    # todo: uncomment this
-    # if envelope.mail_from == mailbox_email:
-    #     # nothing to do
-    #     LOG.d("Forward from %s to %s, nothing to do", envelope.mail_from, mailbox_email)
-    #     return False, "550 SL ignored"
+    if envelope.mail_from == mailbox_email:
+        # nothing to do
+        LOG.d("Forward from %s to %s, nothing to do", envelope.mail_from, mailbox_email)
+        return False, "550 SL ignored"
 
     contact = get_or_create_contact(msg["From"], alias)