From: mouss (no email)
Date: Sun Jul 03 2005 - 03:48:06 EDT
Fabio Rizzi wrote:
> I've two mail server both with postfix: one is for real mail user with
> pop3+imap service, webmail etc. The other is a specific antispam server
> with headers+body checks, blacklist checks etc. without local user and
> used only for relay of messages that have passed checks.
>
> I've noticed that if I change a domain MX towards antispam server,
> forcing in this way the spam filtering rules, spammers continue to
> connect at the older server ignoring the present MX value for the
> domain, bypassing the variuos antispam check.
>
> In the varius domains to manage I specify always ONLY one mx. In the
> case of "antispam service" the relay is done from the antispam server
> with transport map.
>
> So I'm going to filter 100% of valid mail and a small part of spam when
> the remaining big part continue to send at the other mail server. I
> think spammers have personal databases of mx and relates domains names
> and they can ignore the present values of domain's MX.
>
> I've searched a way to receive mail for specified domains only from a
> single relay host with postfix, but up to now, I've not find any method
> to do it.
>
> Can anyone help me ?
>
> Thanks in advance.
>
>
smtpd_recipient_restrictions =
check_client_access hash:$config_directory/allowed_clients
reject
and in allowed_clients:
10.1.2.3 OK
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