efa-project.org

Hello

We have two different servers. They both use the same spam gateway. One does not receive an error when sending an email to the other, but the other one gives the following error when sending an email, even though the domain is not in it.

What could be the problem?

-% log:
Oct 4 16:13:01 mail postfix/smtp[28508]: warning: host antispam1.of.com[xxxx]:25 greeted me with my own hostname mail.eurotrans.ist
Oct 4 16:13:01 mail postfix/smtp[28508]: warning: host antispam.of.om[x...]:25 replied to HELO/EHLO with my own hostname mail.eurotrans.ist

-% mail response:

This is the mail system at host mail.xxx.net.

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

<a@a.com>: mail for a.com loops back to myself

Sounds like you have a mail loop occurring in that direction somehow. I'm not sure why with the information you provided. You may need to check your /etc/postfix/transport file and see if it makes sense for both servers.

I checked. I looked there first. There is no confusion.