[Dovecot] Kerberos

Hey all new to this crack

Ok so i have setup kerosene on my server i run mutt and it goes off and gets kerberos key from server I have added teh gssapi to config file but when the key seams to want to authenticate off dovecot it fail anyone help me?

Mutt is returning No authentication available

Dovecot logs are returning: Mar 18 01:34:31 bandicoot dovecot: auth(default): gssapi(?,MYIPADDRESS): While acquiring service credentials: Miscellaneous failure Mar 18 01:34:31 bandicoot dovecot: auth(default): gssapi(?,MYIPADDRESS): While acquiring service credentials: No principal in keytab matches desired name Mar 18 01:34:34 bandicoot dovecot: imap-login: Aborted login: method=GSSAPI, rip=MYIPADDRESS, lip=MYIPADDRESS, TLS

Thanks