How to make Exim accept incoming messages only from a particular IP/server...?

[albatroz]

Some months ago I started to use Easy-Antispam because my Spam Assassin installation broke. This also reduced the load of my server a lot...
but one of the caveats of using hosted antispam systems like these

Google // http://www.google.com/a/help/intl/en/security/email.html
Easyantispam // http://www.easyantispam.com/

is that these days most spammers point directly to email servers
(without reading DNS MX entries) as a result if you use one of
the above mentioned solutions is used without something like spam assassin
you are lost

So this is my question, how to make Exim to ONLY accept incoming
messages from a particular IP (the IP of the antispam appliance)...

Of course authenticated SMTP feature show be available too...

 

[Webcart]

So this is my question, how to make Exim to ONLY accept incoming
messages from a particular IP (the IP of the antispam appliance)...

Why don't you block unwanted connections with your firewall?

 

[nobaloney]

We've actually researched this but we don't put the code into the default SpamBlocker exim.conf file (it's actually in SpamBlocker 3.1-beta, but commented out).

What you do is block all port 25 traffic on all IP#s on your server except for a new one, which has never been used on the server before. That one you firewall off from the world on all ports, except for port 25 from the IP# of the antispam appliance.

Jeff