Next message: Magnus Bäck: "Re: Howto receive mail for a domain only from a specified host."
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.
