Отправка почты на mail.ru

Везде почта доходит, а этим макаронникам - нет.

Приходит сразу от них отлуп:

The original message was received at Mon, 11 Oct 2010 16:36:25 +0300

from localhost.localdomain [127.0.0.1]



   ----- The following addresses had permanent fatal errors -----

<xxxxxx@mail.ru>

    (reason: 550 Sorry, we do not accept email from IP (178.124.xxx.xxx) with no or

unresolvable DNS PTR-records. Contact your ISP or abuse@corp.mail.ru.)



   ----- Transcript of session follows -----

... while talking to mxs.mail.ru.:

>>> DATA

<<< 550 Sorry, we do not accept email from IP (178.124.xxx.xxx) with no or

unresolvable DNS PTR-records. Contact your ISP or abuse@corp.mail.ru.

554 5.0.0 Service unavailable

В логах это (но я в них не очень то и шарю):

Oct 11 16:36:25 gim sendmail[3290]: o9BDaPmp003290: Authentication-Warning: xxx.xx: apache set sender to forum@xxx.xx using -f

Oct 11 16:36:25 gim sendmail[3290]: o9BDaPmp003290: from=forum@xxx.xx, size=601, class=0, nrcpts=1, msgid=<12086.1.4.153.175.1286804185.squirrel@178.124.xxx.xxx>, relay=apache@localhost

Oct 11 16:36:25 gim sendmail[3291]: STARTTLS=server, relay=localhost.localdomain [127.0.0.1], version=TLSv1/SSLv3, verify=NO, cipher=DHE-RSA-AES256-SHA, bits=256/256

Oct 11 16:36:25 gim sendmail[3290]: STARTTLS=client, relay=[127.0.0.1], version=TLSv1/SSLv3, verify=FAIL, cipher=DHE-RSA-AES256-SHA, bits=256/256

Oct 11 16:36:25 gim sendmail[3291]: o9BDaPuO003291: from=<forum@xxx.xx>, size=798, class=0, nrcpts=1, msgid=<12086.1.4.153.175.1286804185.squirrel@178.124.xxx.xxx>, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]

Oct 11 16:36:25 gim sendmail[3290]: o9BDaPmp003290: to=xxxxxx@mail.ru, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30601, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (o9BDaPuO003291 Message accepted for delivery)

Oct 11 16:36:25 gim dovecot: imap-login: Login: user=<forum@gim.by>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured

Oct 11 16:36:25 gim dovecot: IMAP(forum@xxx.xx): Disconnected: Logged out

Oct 11 16:36:26 gim sendmail[3293]: o9BDaPuO003291: to=<xxxxxx@mail.ru>, ctladdr=<forum@xxx.xx> (501/502), delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=120798, relay=mxs.mail.ru. [94.100.176.20], dsn=5.0.0, stat=Service unavailable

Oct 11 16:36:26 gim sendmail[3293]: o9BDaPuO003291: o9BDaQuN003293: DSN: Service unavailable

Oct 11 16:36:26 gim sendmail[3293]: o9BDaQuN003293: to=\\virtuser_501, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32061, dsn=2.0.0, stat=Sent

Oct 11 16:36:26 gim dovecot: imap-login: Login: user=<forum@xxx.xx>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured

Oct 11 16:36:39 gim dovecot: IMAP(forum@gim.by): Disconnected: Logged out

Oct 11 16:36:45 gim dovecot: imap-login: Login: user=<forum@xxx.xx>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured

Oct 11 16:36:45 gim dovecot: IMAP(forum@xxx.xx): Disconnected: Logged out

Подскажите в чём дело?

п.с.Имя сервера у меня, имя домена. Свой домен и ип в логах изменил.