Originally posted by anfpunk
Hopefully some day they'll make email not suck. Wouldn't it filter almost all of the spam if the receiving server just checked that the domain it's coming from and the server match up? Not even rdns, but just checking the mx record then resolving the ips. This would create more traffic, but once all servers did it, wouldn't it ultimately create less due to no spam. Viruses would still suck though.
My mail server (Argosoft) can check the return address provided in the header against it's domain to make sure it's a legitimate address before it relays the message...and it also checks the ORDB for open-relay servers and can block messages from them.

My problem is that none of the offending stuff actually hits my server at any time - well, except for the "don't spam me" and various "user not found" return messages from various mail servers...

If some major ISP like AOL or Earthlink was to decide that I was a spammer due to this stuff, I would be seriously POd. And there probably wouldn't be anything I could do about it either...