> The --with-gss is actually only used for IMAP authentication. For SMTP, > Mutt's (simple) implementation relies entirely on SASL. Is it possible you > don't have the modules installed for SASL's GSSAPI support? > > If you're on a Debian derivative, try installing libsasl2-modules-gssapi-mit > or libsasl2-modules-gssapi-heimdal and see if that helps. (I'm not very > familiar with GSSAPI and am not sure which package might be the appropriate > one.)
I checked - cyrus-sasl-2.1 plus gssapi, ldap, md5, ntlm, plain modules are all installed.
