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Image filtering

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=5829
Printed Date: 31 July 2025 at 11:59am


Topic: Image filtering
Posted By: raregtp
Subject: Image filtering
Date Posted: 16 October 2006 at 11:13am

Anyone had any lucking finding a solid method of filtering the GIF emails that are becoming common?  We're regularly getting emails that have a GIF image at the top of the body, usually talking about some stock or explosive growth or something....and then a lot of gibberish/looks legit text below the image??

Thanks!


Replies:
Posted By: LogSat
Date Posted: 16 October 2006 at 5:03pm
What version of SpamFilter are you using? From build 3.0.0.547 SpamFilter is able to scan in images themselves for spam content:

// New to VersionNumber = '3.0.0.547';
{TODO -cNew : Added a new filter to detect spam in images embedded inside emails}



-------------
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: raregtp
Date Posted: 16 October 2006 at 9:45pm

Sorry....I should have seen that.  Unfortunately right now we're still evaling, so that option isn't available to us yet.

Thanks for pointing that out!

Posted By: Stephane
Date Posted: 18 October 2006 at 2:55pm
And how about the animated gifs that they send now ? What does spamfilter see ? There are multiple colored bars that become the ... mailto:!@spam - spam add ?

Posted By: Brodie
Date Posted: 04 December 2006 at 4:44pm
Does the image filtering work by OCR and compairing with the blacklist keywords list?

Posted By: LogSat
Date Posted: 04 December 2006 at 7:30pm
We cannot provide too many details on what algorithm(s) we use to perform the image filtering, sorry. There are spammers who read these forums, and we don't want to make life easier for them to find a way around the filters.



-------------
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: Brodie
Date Posted: 05 December 2006 at 9:13am
understood.


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