Setting up an internal mail filter

[Neil Joseph Schelly]

On Monday 18 July 2005 11:32 am, Jeff O'Brien wrote:
> Is there a way to have mail that comes in to the external linux mail
> server to be sent off to the internal mail server for filtering then
> back to the mail server where end users can then get their mail to avoid
> reconfiguring each client and without causing mail loops?

I'm not sure about ClamAV because I haven't played with that much yet.  I 
would assume that you could have unchecked mail get forwarded to the 
filtering server, which would add check it as it processes through it's own 
MTA and add a header before smarthosting it back to the first server.  The 
first server will only forward unchecked (without that header) mail through 
to the second server to keep things from looping.

Anyway, that's one way.  But as for SpamAssassin, you can use spamc and spamd 
which is a client/server process that can scan input email, process it, and 
return it to the spamc client.   Ideally, clamav would have similar 
client/server process you could use, but as I said, I don't know exactly 
since I haven't set it up in years.
-N