>> This is because you have told IMail not to accept mail from NULL senders
>("<>"). You should switch that back, or else you are breaking the RFCs
>(RFC821), and will not get bounce messages.
>
>In the SMTP Security Refuse NULL <> Senders is not checked... Auto-deny
>possible hack attempts is checked.. The name makes it sound like a good
>thing..
That may be where the problem is. I haven't seen any documentation for what
"Auto-deny possible hack attempts" actually does. Either way, for some reason, IMail
wasn't accepting mail from "<>".
>RFCs???
RFCs are the "laws of the Internet". They define things like the SMTP protocol.
Programs (or people running them) can obviously do things differently than the RFCs
state, but if you don't follow the RFCs, things can go wrong.
For example, a recent post here was from someone whose firewall blocked their domain
name and mail server name from being displayed when other mail servers connect. The
firewall people probably thought this was a neat trick, so that hackers couldn't
easily figure out what software was running and what domain it was. But, it violates
the RFCs, so some mail servers may not be willing to send mail to that domain, and
programs designed to figure out what mail servers are most popular will now miss out
on this one.
But, if "Refuse NULL <> Senders" is not checked, you haven't done anything wrong. :)
--
-Scott
Declude: Anti-virus and Anti-spam solutions for IMail. http://www.declude.com
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