pr 5 21:44:58 pt3 sendmail[5677]: l35Diwmb005677: from=asterisk, size=15316, class=0, nrcpts=1, msgid=, relay=asterisk@localhost Apr 5 21:47:39 pt3 sendmail[5707]: l35DldQd005707: from=asterisk, size=28500, class=0, nrcpts=1, msgid=, relay=asterisk@localhost Apr 5 21:47:44 pt3 sendmail[5678]: l35Diw4u005678: from=, size=15464, class=0, nrcpts=1, msgid=, proto=ESMTP, daemon=MTA, relay=pt3.localhost.localdomain [127.0.0.1] Apr 5 21:47:44 pt3 sendmail[5677]: l35Diwmb005677: to="laipeng" , ctladdr=asterisk (501/501), delay=00:02:46, xdelay=00:02:46, mailer=relay, pri=45316, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (l35Diw4u005678 Message accepted for delivery) Apr 5 21:49:35 pt3 sendmail[5711]: l35Diw4u005678: to=, ctladdr= (501/501), delay=00:01:51, xdelay=00:01:51, mailer=esmtp, pri=135464, relay=corpmx.singnet.com.sg. [165.21.1.9], dsn=4.1.8, stat=Deferred: 451 4.1.8 Domain of sender address asterisk@pt3.myasterisk.com does not resolve Apr 5 21:50:22 pt3 sendmail[5708]: l35DldQp005708: from=, size=28648, class=0, nrcpts=1, msgid=, proto=ESMTP, daemon=MTA, relay=pt3.localhost.localdomain [127.0.0.1] Apr 5 21:50:22 pt3 sendmail[5707]: l35DldQd005707: to="laipeng" , ctladdr=asterisk (501/501), delay=00:02:43, xdelay=00:02:43, mailer=relay, pri=58500, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (l35DldQp005708 Message accepted for delivery) Apr 5 21:52:13 pt3 sendmail[5722]: l35DldQp005708: to=, ctladdr= (501/501), delay=00:01:51, xdelay=00:01:51, mailer=esmtp, pri=148648, relay=corpmx.singnet.com.sg. [165.21.1.9], dsn=4.1.8, stat=Deferred: 451 4.1.8 Domain of sender address asterisk@pt3.myasterisk.com does not resolve