아래와 같은 에러가 가끔 발생하는 군요... 무엇때문인지 알 수 있을까요?
  Dec 14 18:16:48 TEST sendmail[3747]: fBE9Ged1003745: SYSERR(root): mail.AAA.com. config error: mail loops back to me (
MX p roblem?)
Dec 14 18:16:48 TEST sendmail[3748]: fBE9Gmd1003748: mail.BBB.com [203.245.XXX.XXX] did not issue MAIL/EXPN/VRFY/ETRN
 during
 connection to MTA
Dec 14 18:16:48 TEST sendmail[3747]: fBE9Ged1003745: to=<robert at AAA.com>, delay=00:00:08, xdelay=00:00:08, mailer=esmtp,
 p ri=30494, relay=mail.AAA.com. [203.245.XXX.XXX], dsn=5.3.5, stat=Local configuration error
Dec 14 18:16:48 TEST sendmail[3747]: fBE9Ged1003745: fBE9Gmd1003747: DSN: Local configuration error
Dec 14 18:16:48 TEST sendmail[3747]: fBE9Gmd1003747: to=<jane at AAA.com>,richard at AAA.com, delay=00:00:00, xdelay=00:00:0
0, mailer=esmtp, pri=158511, relay=mail.AAA.com., dsn=5.3.5, stat=Local configuration error
Dec 14 18:16:48 TEST sendmail[3747]: fBE9Gmd1003747: fBE9Gmd2003747: return to sender: Local configuration error
Dec 14 18:16:48 TEST sendmail[3747]: fBE9Gmd2003747: to=richard at AAA.com, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, 
pr i=128611, relay=mail.AAA.com., dsn=5.3.5, stat=Local configuration error
Dec 14 18:16:48 TEST sendmail[3747]: fBE9Gmd1003747: Losing q6/qffBE9Gmd1003747: savemail panic
Dec 14 18:16:48 TEST sendmail[3747]: fBE9Gmd1003747: SYSERR(root): savemail: cannot save rejected email anywhere