Re: [Exim] forged HELO/EHLO addresses

Hi Andy, on Wed, 12 Nov 2003 13:02:15 +0200 you wrote:

> How do you allow underscores in the HELO check ?

helo_accept_junk_hosts or helo_allow_chars

But please don't use them indiscriminately, because not only will you get
more junk, you'll encourage the people with misconfigured MTAs to believe
that they're in the right.

Much better to tell them to go change their DNS hostname to something
sensible. If they're an Exchange-using idiot, then they will probably moan
that changing their NetBIOS name will break everything else - however, my
(non-authoritative) understanding is that it is possible to change the
Internet hostname independently of the NetBIOS name on Windoze.

Tim