> On 07 Sep 2015, at 00:41, Kanwar Ranbir Sandhu <m3fr...@thesandhufamily.ca> > wrote: > > Hello, > > I'm trying to get Dovecot to use GSSAPI for authentication. I have an IPA > server on CentOS 7 with a bunch of my servers attached to the IPA domain, > including the server running Dovecot. > > I've followed official documentation from Red Hat and read numerous wiki > articles on how to configure Dovecot to get it to use GSSAPI correctly. I > don't think I've done anything incorrectly, but it refuses to work. This is > the error I'm seeing: > > mailman02 dovecot: imap-login: Disconnected (tried to use unsupported auth > mechanism): user=<>, method=PLAIN, rip=1.1.1.1, lip=2.2.2.2, TLS, > session=<QhWSqxofyAAKyAkM>
It says "tried to use unsupported auth mechanism". In your later mail you say that telnet shows AUTH=GSSAPI in capabilities. So that would mean that the client isn't using AUTHENTICATE GSSAPI but something else. Set auth_debug=yes and/or see what the client actually does by enabling pre-login rawlog: http://wiki2.dovecot.org/Debugging/Rawlog
