Problems with Outlook 2010 (beta) sending mails

[petzsch]

I don't see a Problem with the M$-Code here.
When the Mailserver claims to support NTLM as authentication method than it is very well legitim for Outlook to make use of the strongest mechanism both sides support. I mean that's the whole point of "show me your mechanisms, and I'll show you mine"

Current point of my researching: It has something to do with SASL and the supported mechansims from that side. But I can't find the coresponding config file where those mechanisms are configured.
Thx for any useful hints