Postfix ACL doubt

[esantos]

Hi guys

I know the Postfix's smtpd_sender_restrictions option can reject undesired domains, although .... it implies modify the main.cf .

In the other hand, I found below instructions to do the same in Zimbra:

Domain level blocking of users - Zimbra :: Wiki

Wich one is the correct way to reject incoming mail request?

Thank you, ::PoKo::.

[uxbod]

They are two different things all together.

By using the wiki entry you posted then any email address can be blocked and as stated it can also be performed via Amavis and even directly within ZCS V6 now on a per user basis.

For Postfixs main.cf are you referring to reject_unknown_sender_domain ?

[esantos]

hi uxbod

the smtpd_sender_restriction key:

Postfix Configuration Parameters

I'd add into (i.e.) ACL.lst a list of REJECT domains postfix would inmediatly reject, it just compare MAIL FROM command, I think it is an easy way to control undesired domains.

But, behind the scenes, the MAIL FROM command is easy to spoof.

In the simpliest way, I wish to block everything a certain domain has sent to my domain.