Code:
% saslauthd -V
...
saslauthd 2.1.25
authentication mechanisms: getpwent pam rimap shadow ldap
% saslauthd -a kerberos5
saslauthd[20865] :set_auth_mech   : unknown authentication mechanism: kerberos5
However, /etc/sysconfig/saslauthd lists kerberos5 as a possibility for SASLAUTHD_AUTHMECH.

How is one supposed to use Kerberos authentication with Postfix if it is not supported by saslauthd?

(This is for openSUSE 13.1 (x86_64))