Hi,
> I do not know, because the current "MX 20" is receiving
> several 1000 spams per day which has never hit "MX10" before
> which is what I have read on many Forums/Malinglists that
> Spamers sending spam to the lowest MX instead the real mail
> server.
You may try configure "BLACKLISTS=" on esmtpd file and it help you stop some
of those IPs that are sending spams. Another thing to do is to set up your
firewall and implement a DOS rule so you can stop them from the firewall and
delay E-Mails that go to your backup SRV.
Also on the BackUP SRV you may try to find the way to legitimate the FROM
adress by using SPF for example.
Carlos.
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