maillog --When the mail client is enabled with outgoing mail authentication
============================================================================
Jan  1 07:30:26 slanixindika sendmail[10295]: AUTH=server, relay=[10.1.1.67], authid=indika, mech=LOGIN, bits=0
Jan  1 07:30:26 slanixindika sendmail[10295]: q0120QvT010295: from=<indika@mydomain.com>, size=341, class=0, nrcpts=1, msgid=<201201010200.q0120QvT010295@mydomian.com>, proto=ESMTP, daemon=MTA, relay=[10.1.1.67]
Jan  1 07:30:26 slanixindika sendmail[10296]: q0120QvT010295: to=<david@mydomain.com>, ctladdr=<indika@mydomain.com> (500/500), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=30597, dsn=2.0.0, stat=Sent




maillog --when the mail client is disabled with outgoing mail authentication
=============================================================================
Jan  1 07:31:35 slanixindika sendmail[10307]: q0121ZpE010307: from=<indika@mydomain.com>, size=340, class=0, nrcpts=1, msgid=<201201010201.q0121ZpE010307@mydomian.com>, proto=ESMTP, daemon=MTA, relay=[10.1.1.67]
Jan  1 07:31:35 slanixindika sendmail[10308]: q0121ZpE010307: to=<david@mydomain.com>, ctladdr=<indika@mydomain.com> (500/500), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=30572, dsn=2.0.0, stat=Sent