> >d) tell them how to reconfigure Exchange to behave properly - except that
> > I don't know how - so does anyone else know how to do it?
> >
>
> are you sure Exchange was not going past the HELO phase? After all I
> think exim will allow the session to continue even after a rejected
> HELO.
Yes, and I've seen it.
>>> 220 somemailserver ESMTP
<<< EHLO blah_blah.whatever.com
>>> 501 syntatically invalid arguments
<<< HELO blah_blah.whatever.com
>>> 501 syntatically invalid arguments
<<< QUIT
>>> 221 Connection closed by QUIT
Then I saw the fax. "Error was 221 Connection closed by QUIT".
I said "Say what?! 2xx isn't an error!"
> I think rfc-ignorant.org should have the HELO argument check (A
> record of helo -> IP address which implies the absence of _) in their
> listing criteria. Why not push for that, I would support you (for
> what it's worth).
I can see lots of exchange servers in there.
> (btw, I do not give the postmaster address in the RCPT error
> messages, but the URL of a feedback form, this way a faulty server's
> postmaster can contact me anyway)
It's generally not a good idea to put an email address in an error responce.
I have seen spammers snarf that address.
--
Lab tests show that use of micro$oft causes cancer in lab animals
