Author: Kevin P. Fleming Date: To: exim-users Subject: Re: [Exim] Spammer spoofing as a nonexistant user on my system!
Matthew Palmer wrote:
> And then the answer drops into my lap. Which, as it turns out, I can't
> implement anyway because I've got a chain of mail hosts due to some majorly
> fscked up network design issues, where the outside one doesn't know who's
> going to get mail, and putting recipient_verify on the inner one would
> simply clog the queue on the outside one. Arrgh!
>
There are ways to handle this situation, though. If you have an ACL that
can verify the recipient address is not valid, it can set a header that
a later router can check and just drop the message in the bitbucket. But
this could be bad if you really wanted to return bounces to people who
only mistyped a legitimate address... So you'd probably only want to do
it for incoming DSNs, meaning a null sender.
