[cobalt-security] Better Spam Filtering that Sendmail 8.10?

["Lance Rushing" <lance_rushing@xxxxxxxxxxx>]

Hello All,

I am not 100% satisfied with my RaQ4?s sendmail 8.10 capabilities in regards 
to spam filtering / fighting.  I have added a real-time blackhole lists to 
sendmail and installed MailScanner 
(http://www.sng.ecs.soton.ac.uk/mailscanner/) with SpamAssassin 
(http://www.spamassassin.org/) and f-prot virus scan (www.f-prot.com).

[ I have a write up, that I?ll finish and post when I?m satisfied with my 
solution ]

But like I said I?m not 100% satisfied with how MailScanner works.  Namely 
that messages sit in a queue for up to 15 minutes while they are scanned.  I 
figure I have 3 options and wonder if anyone has tried anything like this.

Options:
1: Install Sendmail 8.12.x and use it?s milter capabilities to filter thru 
spamassassin.
    Pros: No need to install/configure additional MTUs.
    Cons: I?m nervous about changing the RaQ?s software.

2: Install postfix/qmail (maybe??) and see if I can get them to act as a 
kind of port relay, after they have filtered the mail.  e.i.  have postfix 
listening to port 25, filter the emails, then send them to port 1025 where 
sendmail would be listening.
    Pros: The RaQ?s software would be left intact (just config which port).
    Cons:  Can it be done???  Having to configure another MTU.

3: Turn off sendmail and replace it with postfix/qmail.
    Pros: Only one mail server running.
    Cons:  Huge programming issue to make it work with the Cobalt Admin.  I 
am confident I could do it, but I don?t know if the 100 hours of perl 
hacking is worth trying to eliminate the current 15minute wait for 
MailScanner.

4: Any other ways to get instant mail/spam filtering???

Anybody tried any of these?  Option 1 looks tempting, just grap the RPM and 
cross the fingers?

Any thoughts?

-Lance




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