Kallithea seems unable to send outgoing emails using ntlm authentification.
The login returns an
SMTPException: No suitable authentification method found. error,
This is Kallithea 0.2.1 running on Ubuntu server. The python-ntlm module is installed and appears under Kallithea's system info page. Our Exchange mail server only allows ntlm as authentification.
I did some snooping around and this looks like a nice example that uses python-ntlm. My very limited python knowledge prevent me from doing much with it, though.