Only accept mail from a specific mailserver for some domains


Verified User
Nov 12, 2003
Hi Guys,

We are using an external spamfilter machine to keep spam away from our hosting (DA) machines. That works for 90% of the spam, but some spammers send mail directly to the hosting server instead of the spamfilter server. I think that they just do an hostname lookup on the domain, not on the MX record.

What I want to do is blocking all mail that not come from the spamfilter machine. I would like to be able to configure this per domain.

Does anybody know how to configure that in Exim? Ofcourse I can pay for it when it has to be a custom solution.