/etc/mail/aliases.db out of date
Aug 6 15:51:33 mgsun sendmail[823]: [ID 801593 mail.notice] n76ALXfa000823: <Sang@mgsun>... User unknown
Aug 6 15:51:33 mgsun sendmail[813]: [ID 801593 mail.info] n76ALXZo000813: to=Sang, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31096, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.1, stat=User unknown
00823: from=<>, size=1096, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1]
00813: n76ALXZp000813: return to sender: User unknown
Aug 6 15:51:33 mgsun sendmail[823]: [ID 801593 mail.info] n76ALXfc000823: from=<>, size=3566, class=0, nrcpts=1, msgid=<200908061021.n76ALXZp000813@mgsun>, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1]
Aug 6 15:51:33 mgsun sendmail[813]: [ID 801593 mail.info] n76ALXZp000813: to=postmaster, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=32120, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (n76ALXfc000823 Message accepted for delivery)
Aug 6 15:51:33 mgsun sendmail[824]: [ID 702911 mail.info] alias database /etc/mail/aliases.db out of date
Aug 6 15:51:33 mgsun sendmail[824]: [ID 801593 mail.info] n76ALXfc000823: to=root, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=33739, dsn=5.3.0, stat=unknown mailer error 5
Aug 6 15:51:33 mgsun sendmail[824]: [ID 801593 mail.info] n76ALXfc000823: n76ALXfY000824: postmaster notify: unknown mailer error 5
Aug 6 15:51:33 mgsun sendmail[824]: [ID 801593 mail.info] n76ALXfY000824: to=root, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31024, dsn=5.3.0, stat=unknown mailer error 5
Aug 6 15:51:33 mgsun sendmail[824]: [ID 801593 mail.info] n76ALXfY000824: n76ALXfZ000824: return to sender: unknown mailer error 5
Aug 6 15:51:33 mgsun sendmail[824]: [ID 801593 mail.info] n76ALXfZ000824: to=root, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31024, dsn=5.3.0, stat=unknown mailer error 5
Aug 6 15:51:33 mgsun sendmail[824]: [ID 801593 mail.alert] n76ALXfY000824: Losing ./qfn76ALXfY000824: savemail panic
Aug 6 15:51:33 mgsun sendmail[824]: [ID 801593 mail.crit] n76ALXfY000824: SYSERR(root): savemail: cannot save rejected email anywhere