Setup the Antivirus/antspam gateway for the dipartments of college

hello experts,

 I have on requirement. where i need to setup a intermidiate server for my college departments.

each departments have their own domainnames (like el.amt.gcoe.edu, cs.amt.gcoe.edu.. etc) and IPs.

Regrdless of those diff. IPs and domain names I want to setup a gateway server where all emails for the departments (or can say domain) I can receive on my server and scan with antivirus also check for spam filter and then forward it to that particular user/domain.


For this requirement what configuration I need on my gateway.(i will prefer RedHat for a gateway).

As per my knowledge I will use
 Sendmail/postfix ( mail Exchanger)
 DSPAM ( spam filter)
 KAV/Mcfee (antivirus)

Now my questions are as..
1. Is it sufficient for having the gateway server to work? Please give me requirement lists for my       particular application.
2. What steps should I fallow to get my server setup?
3. how should I use Dspam and Antivirus programs for scanning/filtering?
   3.1. I will write down the routines to call those filter/scanner but how should i call those routine          in sendmail/postfix?
4. Is any other tool avaliable in linux ( preferably in RedHat) that does all those stuf together.

As I have to finish this project urgently to get time for my exam studies, your help will be very helpfull for me.

Thanks in advance...

pssolankiAsked:
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jlevieCommented:
What you want is pretty easy to accomplish. I'd use sendmail+MailScanner+McAfee (or CA's eTrust) and have the anti-spam/anti-virus gateway relay the mail to the appropriate internal mail server. MailScanner isn't too hard to set up, especially on a RedHat system and it does a really good job of anti-spam control. you can read more about it at http://www.sng.ecs.soton.ac.uk/mailscanner/index.html
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