[Mimedefang] Performance Benchmarking / Experiances

[Cormack, Ken]

Absolutely you should be using access.db!

If you can have access.db block a connection from and IP address, why then
would you want to otherwise encure all the bandwith and computing horsepower
receiving the message, picking it apart, parsing it, examining, scoring,
scanning, and whatnot, then to only decide "oh, it's just crap... throw it
away."?

If you saw the stats I posted earlier, the mailstats output at the top
showed 9205 rejections, and 1327 discards for esmtp for just yesterday, all
based on access.db on my system.  That's 15000 more messages that I would
have had to process, had they just not simply had the door slammed shut at
the moment of connection.

Access.db can be used for SO MUCH more than that, too.  You might seriously
want to reconsider your decision not to use this powerful feature of
sendmail.

Ken

-----Original Message-----
From: Clayton, Nik [IT] [mailto:nik.clayton at citigroup.com]
Sent: Thursday, September 25, 2003 11:44 AM
To: mimedefang at lists.roaringpenguin.com
Subject: RE: [Mimedefang] Performance Benchmarking / Experiances


> On the filtering servers sendmail is configured as a PROMISCUOUS RELAY
> so that it is NOT using the access.db to control relaying.  We use
> filter_relay in mimedefang to check against a black list of
> spammers...but that is not very effective.  Most of the work 
> is done in filter_recipient.

Why aren't you using the access.db?  Sendmail will consult this, and 
reject the message if necessary without ever needing to send data to
a milter.  Doing IP/domain based blacklisting in MIMEDefang isn't 
terribly efficient -- although it has other benefits (keeping the data
in external databases, for example).

N
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