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02-04-2012, 09:31 AM #1
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- Jan 2012
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Can Postfix rejecting sender if no matching MX record?
I have a stock install of Postfix from my Ubuntu repository.
When I get spam coming consistently from a certain ISP, I block its IP range. I would rather not do this, but technical people under WHOIS don't take action against my complaints.
I am wondering if there is a way to configure Postfix to do a MX lookup on the sender during the MTA transaction, to match the sending SMTP's server IP address against the one MX record for the mail thats coming from?
Sender 22.214.171.124 (firstname.lastname@example.org) > My Server
My Server > MX lookup example.com
If MX for example.com contains 126.96.36.199, accept mail, else reject.