Postfix And reomte server antispam

Hi to All

I have a problem with some remote server reject emails from my MTA. with this error message:


This is the mail system at host

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

n.latheef@EL-SEIF.COM.SA: host mail.EL-SEIF.COM.SA[] said: 550
Requested action not taken: mailbox unavailable or Anti-spam Action (in
reply to end of DATA command)

So please I need your kind support.

thank you in advance


Well, it’s difficult to know the exact issue with the information they’re providing you… however, one thing you may want to check is to see if your IP address somehow ended up on a blacklist of some sort.

One way to look into that would be to go here, and input your server’s IP address: