[Dovecot] NTLM failures with an interesting twist

[Gavin Hamill]

http://lists.andrew.cmu.edu/pipermail/cyrus-sasl/2008-May/001388.html

This looks to be relevant .. OL2007 sends username at emaildomain.com as
the username rather than username at windows-domain.com.

In our setup, the email domain is not the same as the Windows domain
name (domainname.com versus ad.domainname.com) so I guess that's why it
fails for us, but probably works for other people..

gdh