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RE: OT: SMTP pre-filter server

2005-08-22 10:41:37
-----Original Message-----
From: Dennis Willson [mailto:taz(_at_)taz-mania(_dot_)com]
Sent: Monday, August 22, 2005 1:25 PM
To: spf-discuss(_at_)v2(_dot_)listbox(_dot_)com
Subject: Re: [spf-discuss] OT: SMTP pre-filter server


Actually if you putting this in front of Exchange, I suggest using XWall
http://www.dataenter.co.at/index.htm It has many many anti-spam features
and it understands Exchange (Can check for valid users using AD, It can
direct Exchange to put certain email in the outlook spam folder, etc...

It supports SPF, greylisting, DNSBL, Bayes, Heuristics, Subject phrases,
Body Text Phrases and it will auto learn to whitelist by looking at the
outgoing email and automatically put email addresses that users send to
on the white list (either just for them or globally) and all of this is
completely configurable.

I wish there was a Linux version of this.

According to their web site:

http://www.dataenter.co.at/products/xwall.htm

They use SPF only as an input to filtering heuristics.  This can work, but
SPF was really designed to support SMTP time accept/reject decisions.  So
yes, it supports SPF, but not in the way it was primariliy intended to work.
This  may be satisfactory for OP, but maybe not.

Additionally, with minor exception of Exchange event sink support, you can
do all that with Postfix and add-ons.

OP also said they preferred an Linux solution which this is not.

With some minor exceptions and some assembly required there is a Linux
equivalent of this.

Scott K


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