What do the following strange messages which sendmail outputs mean? : "SYSERR(root):....."

Issue

• sendmail outputs the following strange message

  Nov 17 10:52:33 testhost sendmail[3744]: oAH1qWiY003744: from=, size=3360787, class=0, nrcpts=1, msgid=201011170151.oAH1pImQ023612@gg01.bb.example.com, proto=ESMTP, daemon=MTA, relay=[10.0.10.200]
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: SYSERR(root): timeout writing message to [192.168.3.111]: Broken pipe
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 0: fl=0x0, mode=20666: CHR: dev=0/17, ino=1395, nlink=1, u/gid=0/0, size=0
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 1: fl=0x1, mode=20666: CHR: dev=0/17, ino=1395, nlink=1, u/gid=0/0, size=0
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 2: fl=0x1, mode=20666: CHR: dev=0/17, ino=1395, nlink=1, u/gid=0/0, size=0
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 3: fl=0x2, mode=140777: SOCK localhost->[[UNIX: /dev/log]]
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 4: fl=0x2, mode=100600: dev=104/3, ino=622364, nlink=1, u/gid=0/51, size=4294
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 5: fl=0x0, mode=100600: dev=104/3, ino=622361, nlink=1, u/gid=0/51, size=3356982
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 6: fl=0x8000, mode=100640: dev=104/3, ino=3172947, nlink=1, u/gid=0/0, size=12288
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 7: fl=0x8000, mode=100640: dev=104/3, ino=3172947, nlink=1, u/gid=0/0, size=12288
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 8: fl=0x802, mode=140777: SOCK example.com/52921->(Transport endpoint is not connected)
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 9: fl=0x802, mode=140777: SOCK example.com/52921->(Transport endpoint is not connected)
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 11: fl=0x8000, mode=100640: dev=104/3, ino=3172945, nlink=1, u/gid=0/0, size=12288
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: 12: fl=0x8000, mode=100640: dev=104/3, ino=3172945, nlink=1, u/gid=0/0, size=12288
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: MCI@0x0: NULL
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: MCI@0x9062f54: flags=6404c, errno=32, herrno=0, exitstat=75, state=8, pid=0, maxsize=0, phase=client DATA 354, mailer=smtp, status=4.4.2, rstatus=(null), host=[10.0.0.10], lastuse=Wed Nov 17 10:52:34 2010¥n
  Dec 8 20:27:39 testhost sendmail[3746]: oAH1qWiY003744: to=229-3110@aa.example.com, delay=00:03:07, xdelay=00:03:06, mailer=smtp, pri=3480787, relay=[10.0.0.10] [10.0.0.10], dsn=4.0.0, stat=Deferred
  Nov 17 11:10:05 testhost sendmail[3829]: oAH1qWiY003744: to=229-3110@aa.example.com, delay=00:17:33, xdelay=00:00:00, mailer=smtp, pri=3570787, relay=[10.0.0.10], dsn=4.0.0, stat=Deferred