exim4 / spamassassin / clam-av

Hi NG,

i want to realize a mail gateway with exim, spamassassin and clam-av.

The gateway should be the MX entry for a special domain and all mails
going to this server should be scanned and rejected in case of spam or a
virus. If the mail is clean it should be sent to a second mailserver,
the special mailserver for the domain.

I want to setup the exmi4 system with a list of domains and ips, to
assign the mail to their special mailserver.

For example the exim4 on my gateway knows:

domain1.com -> 1.1.1.1
domain2.com -> 1.1.1.2
domain3.com -> Check next MX

Case 1)
A email (test@domain1.com) arrives to my gateway. The gateway looks for
viruses and spam and is doing different things. After adding a SPAM
Header or deleting the message in case of a virus, the mail should be
delivered to 1.1.1.1.

Case 2)
See case 1, but with email test@domain2.com and server 1.1.1.2

Case 3)
See above. But instead of sending to a special ip, the mail should be
sent to the next MX record for that domain.


Does anyone know how i may realize this system with exim4 / spamassassin
/ clam-av? Possibly one of you can give me a hint for a good
documentation! :)


Thank you,
Alex
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Alexander Lapp, lapp@dynadept.de