Block domain, but allow subdomain?

[grlygrl13]

Hi All

I am trying to figure out the best way to set up an anti-spoof for my domain on sendmail. Currently I have in my access.mta file

From:abc.com REJECT

I now have a subdomain that is sending mail back inbound that appears to be from 123.abc.com. I need to accept this email, but I still want to keep the measures in place to reject the other email. Can this be done?

Any ideas/input are appreciated!

 

[jkupski]

IIRC, this is no different than any other ACL--the first rule to match is used. So if you had

From:123.abc.com ACCEPT
From:abc.com REJECT

it would work. Alternatively, if you had:

From:abc.com REJECT
From:123.abc.com ACCEPT

it would not work, since the REJECT rule would match first.

It's been some time since I played with Sendmail, so I may be mistaken--but I do not believe I am.