[Spambayes] Spam in Images
rcoe at CambridgeMA.GOV
Thu Aug 3 14:53:04 CEST 2006
> From: spambayes-bounces+rcoe=cambridgema.gov at python.org
> [mailto:spambayes-bounces+rcoe=cambridgema.gov at python.org] On
> Behalf Of skip at pobox.com
> Sent: Wednesday, August 02, 2006 11:55 PM
> To: Peter Barker
> Cc: spambayes at python.org
> Subject: Re: [Spambayes] Spam in Images
> Peter> For my spam and non-spam, a good indicator is that I very
> Peter> receive non-spam messages with a .gif image attached
> Peter> are usually .jpg or various document types). And if a wanted
> Peter> has a .gif attachment it has much more text than the usual
> Peter> gibberish in the spam messages (because it is usually just a
> Peter> company logo or similar, and not essential to the message). So
> Peter> spambayes can score attachment type and text size it may help.
> True, but for those people with correspondents who do send
> them mail with image attachments ("Subject: Cute pictures of
> my new granddaughter"), the presence or absence of images may
> fall around the middle and thus either not be used at all, or
> only provide a negligible bump in one direction or the other.
But Peter's point is that a picture of somebody's granddaughter won't be
a GIF image; it will be a JPEG. Digital cameras don't use GIF, and
hardly anybody else does either. Except spammers, who presumably care
less about image quality than about file size.
I suppose the result of scoring GIF images as spam will be that spammers
will switch to JPEG. But anything that makes their lives more
complicated is all to the good.
More information about the SpamBayes