[BlueOnyx:06933] Find remote ip in logs

[Maurice de Laat]

Hi list,

More and more I see these kind of security warnings in my 
/var/log/messages:
Apr  8 11:08:29 arie saslauthd[3489]: do_auth         : auth failure:
[user=office] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]


However, there is no remote ip given. It also can't be found in maillog.

Does anybody know how I can find the offending remote ip?

Thanks
-- 
Maurice de Laat