[windows2000] Re: Glenn's Software Pick of the Week: ASSP (Anti-S pam SMTP Proxy)
- From: "Sullivan, Glenn" <GSullivan@xxxxxxxxxxxxxx>
- To: "'windows2000@xxxxxxxxxxxxx'" <windows2000@xxxxxxxxxxxxx>
- Date: Thu, 19 Feb 2004 12:27:15 -0500
On a gateway...
Inbound, the mail goes like this:
Internet -> ASSP -> (which proxies the connection to) -> Exchange -> User
Outbound, it goes like this:
User -> Exchange Server -> ASSP -> IIS SMTP Engine.
Before anyone comments on the security of using IIS's SMTP engine (which was
my first thought...), Exchange 2000 and higher all use IIS's SMTP engine as
their own. So it is no more or less secure than the SMTP engine that would
be used directly.
Hope this helps,
Glenn Sullivan, MCSE+I MCDBA
David Clark Company Inc.
-----Original Message-----
From: Puetz, Christoph [mailto:christoph.puetz@xxxxxxxxxxx]
Sent: Thursday, February 19, 2004 10:08 AM
To: 'windows2000@xxxxxxxxxxxxx'
Subject: [windows2000] Re: Glenn's Software Pick of the Week: ASSP
(Anti-S pam SMTP Proxy)
Are you running it on the SMTP Gateway or Exchange itself?
Christoph
-----Original Message-----
From: Sullivan, Glenn [mailto:GSullivan@xxxxxxxxxxxxxx]
Sent: Thursday, February 19, 2004 5:38 AM
To: 'Windows2000@xxxxxxxxxxxxx'
Subject: [windows2000] Glenn's Software Pick of the Week: ASSP (Anti-Spam
SMTP Proxy)
I guess the subject is misleading... I'm not picking something every week.
Buy hey, I got your attention, didn't I?
I have recently been turned onto a piece of open source software called the
"Anti-Spam SMTP Proxy" by NTSysAdmin list member Martin Blackstone. I can't
believe what a phenomenal job it does at catching Spam, and the best part
about it is its price...
$0
Here it is:
http://assp.sourceforge.net
It is a Spam killer that functions at the SMTP level. It has
Auto-whitelisting (anyone you mail is automatically whitelisted), Bayesian
scanning, and built in attachment blocking, and more other options than you
can shake a stick at.
I am still running in test mode, which delivers everything, but tags the
subject with text to identify spam, and I have been amazed at the accuracy.
More info upon request, but here's some rough stats for our company:
Messages Processed: 300,067
Spam Marked: 154,876
Local Mail: 125,770
Viruses Blocked: 4,971
Mail from Whitelisted Senders: 6,241
Percentage of Non-local mail that is spam: 88.9%
I can't wait to see how much lower my Exchange Server's "baseline" is when I
switch off test mode, and it no longer has to process all those spam
messages...
The "Exchange Install" directions are not as good as I'd like, and I'm
re-writing them, so they will get better eventually. But if you'd like help
setting it up, feel free to ask.
Glenn Sullivan, MCSE+I MCDBA
David Clark Company Inc.
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