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Image filter threshold

Printed From: LogSat Software
Category: Spam Filter ISP
Forum Name: Spam Filter ISP Support
Forum Description: General support for Spam Filter ISP
URL: https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5900
Printed Date: 10 May 2025 at 11:11pm


Topic: Image filter threshold
Posted By: Stupid
Subject: Image filter threshold
Date Posted: 05 December 2006 at 9:31am

How do I adjust this? I don't really see much being filtered while stream of image spams are hitting even my mail box.

What is the proper setting number people are using?




Replies:
Posted By: Lee_H
Date Posted: 12 December 2006 at 10:45am
I would like to know too!


Posted By: LogSat
Date Posted: 12 December 2006 at 6:53pm
The image threshold is in the main "Setttings - Configuration" tab in SpamFilter. The higher the value, the more aggressive the filter. Please note that this filter is not going to stop every spam image (as you've already noticed ). The default settings are what we believe are the safest ones, but only trial and error will allow you to improve the values that best fit your environment.

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Roberto Franceschetti

http://www.logsat.com" rel="nofollow - LogSat Software

http://www.logsat.com/sfi-spam-filter.asp" rel="nofollow - Spam Filter ISP


Posted By: kfries
Date Posted: 18 December 2006 at 2:51pm
what exactly does the number indicate?  think default is set to 10.  Is this a size of the image or ?  thanks!


Posted By: __M__
Date Posted: 19 December 2006 at 6:27am
Roberto, we see repeat emails on a daily basis with the same embedded image in them. Can I email you a few copies so you can investigate why this particular message is slipping through so often?

Mike


Posted By: LogSat
Date Posted: 19 December 2006 at 11:15pm
Sure!

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Roberto Franceschetti

http://www.logsat.com" rel="nofollow - LogSat Software

http://www.logsat.com/sfi-spam-filter.asp" rel="nofollow - Spam Filter ISP


Posted By: Desperado
Date Posted: 21 December 2006 at 10:17pm

These may be somewhat agressive but, so far I have good luck with the following:

SpamImageThreshold=15
SpamImageColorSensitivity=20
SpamImageMinWidth=200
SpamImageMinHeight=125
SpamImageSamplingPoints=200



-------------
The Desperado
Dan Seligmann.
Work: http://www.mags.net
Personal: http://www.desperado.com



Posted By: Stupid
Date Posted: 22 December 2006 at 12:02pm

I just ban all of src=cid:

 



Posted By: ImInAfrica
Date Posted: 22 December 2006 at 6:04pm

desperado - are you actually using these settings?
"somewhat agressive" looks like a major understatement.
we tried settings similar to these, but got a lot of false positives. especially with outlook stationery.

out threshold doesn't come near 15. more like 8-9

 



Posted By: Desperado
Date Posted: 26 December 2006 at 12:13pm
Yes,  Those are our settings and we have had no complaints so far (about 2 weeks at that setting) but are watching it on a regular basis.  We also have a customer base of 95% business and most of these users do not BS around with fancy "stationary" of smiley faces or other "features".  Most are running mail systems that are controlled by their mail administrators and most run their logos past our filters to make sure they are not blocked.

-------------
The Desperado
Dan Seligmann.
Work: http://www.mags.net
Personal: http://www.desperado.com




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