trouble with smtp and authentication to an exchange server

[Olaf Föllinger <olaf.foellinger@xxxxxx>]

Hi,

I'm trying to send my mails to an exchange server and use
authentication. First I've had problems to compile in SASL2 but found
the solution here: http://marc.info/?l=mutt-dev&m=117752314512877&w=2.
Now it compiles and starts fine. When it delivers the mail to the mail
server it asks for the password and then fails with the message 

No authenticators available

How can I further track the problem?

Generally authentication works.

telnet mail 25
...
250-AUTH GSSAPI NTLM LOGIN
250-AUTH=LOGIN


I'm using mutt 1.5.18 on cygwin. 

Gruß Olaf Föllinger