I'm pulling my hair out and getting an error message that seems like a catch-all for saslauthd, “saslauthd internal error”. Searching around, I see plenty of people getting the same error message, but with slightly different problems. None of their solutions is working for me. Briefly, this works fine: $ kadmin -p username -w password But this fails: $ testsaslauthd -u username -p password 0: NO "authentication failed" saslauthd works fine with "-a sasldb", but the above is with "-a kerberos5" This is the most detail I seem to be able to get from saslauthd: saslauthd[6405]: auth_krb5: krb5_get_init_creds_password: -1765328353 saslauthd[6405]: do_auth : auth failure: [user=username] [service=imap] [realm=] [mech=kerberos5] [reason=saslauthd internal error] Kerberos seems happy: krb5kdc[32128](info): AS_REQ (4 etypes {18 17 16 23}) 127.0.0.1: ISSUE: authtime 1298779891, etypes {rep=18 tkt=18 ses=18}, username@REALM for krbtgt/DOMAIN@REALM I’m running Ubuntu 10.04 (lucid) with the latest updates, namely: Kerberos 5 release 1.8.1 saslauthd 2.1.23 Thanks for any clues. -- Daniel