Topic: Sender address rejected: not logged in
======== Required information ====
- iRedMail version: latest
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Linux/BSD distribution name and version: Ubuntu
- Related log if you're reporting an issue:
Users are reporting the following problem:
firstname.lastname@example.org emails to email@example.com which auto forwards to firstname.lastname@example.org.
email@example.com gets Mail delivery failed: returning message to sender
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
(ultimately generated from firstname.lastname@example.org)
SMTP error from remote mail server after RCPT TO:<email@example.com>:
host mail.ourdomain.com [188.8.131.52]: 553 5.7.1 <firstname.lastname@example.org>:
Sender address rejected: not logged in
Any ideas why and how to fix?