From: mouss (usebsdfree.fr)
Date: Thu Aug 24 2006 - 18:48:11 CDT

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Matt Francis wrote:
> Hey all,
>
> I am having a problem with postfix not sending mail to certain
> domains, and the error messages follow. The "server refused to talk
> to me" errror is rare, but the timeout (in reply) is all over the
> place. I have dropped my MTU to 1400, hoping that would fix my
> delivery issues.
>
> Aug 22 04:14:49 penguin postfix/qmgr[6967]: 03E193056C:
> from=<memy.net>, size=1641, nrcpt=1 (queue active)
> Aug 22 04:14:49 penguin postfix/qmgr[6967]: EE952300F8:
> from=<memy.net>, size=2604, nrcpt=1 (queue active)
> Aug 22 04:19:53 penguin postfix/smtp[13698]: 03E193056C: host
> mail.org[XXX.XXX.XXX.XXX] said: 421 4.0.0 Error: timeout (in reply to
> end of DATA command)
> Aug 22 04:19:53 penguin postfix/smtp[13699]: EE952300F8: host
> mail.org[XXX.XXX.XXX.XXX] said: 421 4.0.0 Error: timeout (in reply to
> end of DATA command)
> Aug 22 04:19:53 penguin postfix/smtp[13699]: connect to
> mail.org[XXX.XXX.XXX.XXX]: server refused to talk to me: 421 Service
> not available, too many connections (port 25)
> Aug 22 04:19:53 penguin postfix/smtp[13699]: EE952300F8:
> to=<userAmail.org>, relay=none, delay=337792, status=deferred
> (connect to mail.org[XXX.XXX.XXX.XXX]: server refused to talk to me:
> 421 Service not available, too many connections )
> Aug 22 04:24:52 penguin postfix/smtp[13698]: 03E193056C:
> to=<userBmail.org>, relay=mail.org[XXX.XXX.XXX.XXX], delay=20493,
> status=deferred (host mail.org[XXX.XXX.XXX.XXX] said: 421 4.0.0 Error:
> timeout (in reply to end of DATA command))

The reason is that XXX.XXX.XXX.XXX decide to xxx you because of xxx
being used for xxx.

If you want help, post ___your IP___ and unaltered logs. If not willing,
then ask the admin of XXX.XXX.XXX.XXX or your ISP customer support.
but in no case should you spoof real domains (my.net, mail.org).

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