RE: Discourage broken content (was: Broken images in mails)

2006-08-25 Thread Kash, Howard \(Civ, ARL/CISD\)
 
> I think we should discourage all broken content in email and on the
web.

But who is to decide what is "broken".  Just because
giftext/giffix/gocr/etc. fail to parse it, doesn't necessarily mean it's
broken.  The software may be buggy (note the patches on the download
page needed to make these utilities work properly with legitimate
images).


Howard


RE: Discourage broken content (was: Broken images in mails)

2006-08-25 Thread Kash, Howard \(Civ, ARL/CISD\)
 
> Yes, by definition, it DOES mean its broken.


So when then giftext author made an error in assuming every image would
have a global colormap, he redefined the GIF specification so that any
that don't are no longer valid?


Howard  


RE: Discourage broken content

2006-08-25 Thread Kash, Howard \(Civ, ARL/CISD\)

> Could somebody explain to me the reason why MailScanner acts this way?
> A good question could be decide if you adapt this plugin to be
compatible 
> with MailScanner or tha last one should change this practice.

As a resource/denial of service protection mechanism.  If someone starts
feeding you 10MB messages and spamassassin has to run all of its regular
expression checks, etc. on the full content of every message, your
server would die.  Or consider sites the have lots of messages with huge
PowerPoint attachments.  SPAM messages are rarely very big, so it's
actually a nice feature - until you want to use plugins like FuzzyOCR
that need full content.


Howard