Hello,

I got a problem of mail server. The maillog shows
Apr 17 17:41:53 mail sendmail[26826]: m3H8ffRW026826: SYSERR(root): collect: read timeout on connection from XXX.com, from=<yyy@XXX.com> Apr 17 17:41:53 mail sendmail[26826]: m3H8ffRW026826: from=<yyy@XXX.com>, size=4795, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=XXX.com [211.102.41.77]

The connections from others mail sever is fine. Only XXX.com can't send mail to me. However, XXX.com can receive mails I send. Where is the problem. Please help me. Thank you very much.

By the way, the O.S. is RedHat EL 5.0.

Thanks,
dabin

That is a networking problem, they have a bad connection to your server.