求助，關(guān)于sendmail發(fā)送接受郵件

luckylh

局域網(wǎng)中有2臺server，A：已配置好的郵件服務(wù)器可以正常使用，B：redhat AS3。
現(xiàn)在需要再B上配置sendmail，能夠發(fā)送郵件到A上同時(shí)也能接受A發(fā)送的郵件。

已經(jīng)配置了sendmail.cf,local-host-name,access.
使用telnet 連接25端口正常。
再dns服務(wù)器上添加了mx記錄

但是發(fā)送郵件的時(shí)候總是顯示找不到用戶。
那位高手知道到底如何正確配置sendmail。

下面是部分maillog

Apr 13 15:03:18 ocs-testserver sendmail[9568]: i3D73IV7009568: from=<hao.liu@airtown.com>;, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=ocs-testserver.airtown.com [192.168.3.123]
Apr 13 15:04:29 ocs-testserver sendmail[9603]: i3D74TV7009603: <sysadmin@airtown.com>;... User unknown
Apr 13 15:04:29 ocs-testserver sendmail[9603]: i3D74TV7009603: from=<hao.liu@airtown.com>;, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=ocs-testserver.airtown.com [192.168.3.123]
Apr 13 15:06:13 ocs-testserver sendmail[9638]: i3D76DV7009638: <sysadmin@airtown.com>;... User unknown
Apr 13 15:06:13 ocs-testserver sendmail[9638]: i3D76DV7009638: from=<hao.liu@airtown.com>;, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=ocs-testserver.airtown.com [192.168.3.123]
Apr 13 15:06:54 ocs-testserver sendmail[9682]: i3D76sOM009682: from=oraocs, size=271, class=0, nrcpts=1, msgid=<200404131506.54325.>;, relay=localhost [[UNIX: localhost]]
Apr 13 15:06:54 ocs-testserver sendmail[9682]: i3D76sOM009682: to=workflow@airtown.com, ctladdr=oraocs (500/500), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30271, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection refused by [127.0.0.1]
Apr 13 15:11:01 ocs-testserver sendmail[9803]: i3D7B1V7009803: <sysadmin@airtown.com>;... User unknown
Apr 13 15:11:04 ocs-testserver sendmail[9803]: i3D7B1V7009803: from=<test1@airtown.com>;, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=liuhao [192.168.3.50] (may be forged)
Apr 13 15:24:12 ocs-testserver sendmail[10123]: i3D7NCV7010123: liuhao [192.168.3.50] (may be forged) did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA