Hoping someone will be willing to share but they feel is the best and
easiest gateway product to place in front of my Imail server. I am
looking
to reduce the amount of work that the mail server has to do.
The free project ASSP does this very well and does not require additional
hardware. It is written in perl and can run on the same server Imail is on
or on another machine with just about any modern OS. We are running it on
the same server as Imail.
It does:
1. Recipient validation
2. Greylisting - delays emails from IP addresses it has not spoken to. this
has the added benefit of blocking nearly 100% of viruses as they don't seem
to resend. However the occasional bounced virus does get through as the
sending server is a legitimate email server that is misconfigured to bounce
viruses to the perceived sender.
3. Rejecting based on forged HELO and bad HELO, multiple RBL threshold, SPF
fail, Spam honeypot addresses to collect spam, Spam trap addresses to block
IPs immediately, etc.
4. Automatic blacklisting of IP's that commit various errors, all
configurable.
5. Excellent easily readable logging to text file or syslog.
Doug Traylor
use Google to search the Imail list history for ASSP related posts:
http://www.google.com/search?hl=en&q=%5BImail_Forum%5D+assp+site%3Ahttp%3A%2F%2Fwww.mail-archive.com
and visit ASSP's mailing lists at:
http://sourceforge.net/mail/?group_id=69172
and the forums at:
https://sourceforge.net/forum/?group_id=69172
it's homepage at: (definately read the documentation on setting up a new
server)
http://assp.sourceforge.net/
and it's Wiki at: (for questions about the recent functional additions)
http://www.asspsmtp.org/wiki/Welcome
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