mail rejection question

[hescominsoon]

I have a spam appliance in front my my zimbra. The firewall does a clalout for every mail to see if the user actually exists before processing hte mail..which works for me. however what i have found is the zimbra machine is accepting all connections irregardless of if the recipient mailbox exists or not. The mail server then rejects the mail and bounces it back to the firewall. What i need the mailserver to do is to reject invalid usernames at this clalout point so that the invalid mail isn't being sent to the zimbra box at all. How can i accomplish this?

[irfan]

This can help you:

Improving Anti-spam system - Zimbra :: Wiki

Note that setting smtpd_reject_unlisted_recipient will resulting in rejecting emails to alias domian users too. Here is a bug report.

https://bugzilla.zimbra.com/show_bug.cgi?id=54782

[hescominsoon]

Originally Posted by irfan

This can help you:

Improving Anti-spam system - Zimbra :: Wiki

Note that setting smtpd_reject_unlisted_recipient will resulting in rejecting emails to alias domian users too. Here is a bug report.

https://bugzilla.zimbra.com/show_bug.cgi?id=54782

so if i only have one domain on the server then it's safe for me to enable the command...am i reading that correctly? this machine is never going serve more than the current domain.

[hescominsoon]

where is zmmta.conf? if that's a misprint is it zmta.conf? where's that at?

[irfan]

Yes it should safe to use if your using only one domain.
The file is /opt/zimbra/conf/zmmta.cf

[hescominsoon]

thanks you!!