List Mail User a écrit :
You're a lot more polite than I am. I prefer:
my_domain.tld 550 You're lying - Trying to use my host
.my_domain.tld 550 You're lying - Trying to use my host
I don't wanna risk being sued/beaten by some angry guy:)
It is also good to use similar checks for the senders as well
as the HELO - i.e.
[EMAIL PROTECTED] 550 You are a liar - Sender is not you!
[EMAIL PROTECTED] 550 You are a liar - Sender is not you!
the issue is that this breaks forwarding, so not everybody wants to do it.
If you really want that, why not also protect others against that and
set SPF records for your domain (and use SPF).
Of course this is much simpler (fewer special cases) when you use
separate machines/MTAs for incoming and outgoing mail or if your network
is (relatively) small.
or multiple instances on same box. but of course, multiple boxes are
better.
