Topic: Strange behaviour for forwarded mails
======== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.7
- Linux/BSD distribution name and version: Debian 7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? Yes
we have a strange behaviour from our iredmail server.
Our server hosts domains:
email@example.com send an e-mail to firstname.lastname@example.org.
All e-mails from email@example.com are forwarded to firstname.lastname@example.org.
The external Mailserver at c.com receives the e-mail and tries to forward it to email@example.com.
This fails with:
This is the mail system at host c.com.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
<firstname.lastname@example.org>: host mx.srhosting.eu[xx.xx.xx.xx] said: 554
5.7.1 <email@example.com>: Recipient address rejected: SMTP AUTH
is required, or it is a spam with forged sender domain (in reply to RCPT TO
Now, the way i see it is that the e-mail is being denied, because c.com is not in the list of authorized senders for domain a.com. But it's a simple forward ?!?
Any ideas ?