Blocking Spam emails that use non standard images.

[Arin 0]

Does anyone know any way to block emails that show their important spam as images? The images arent refferenced in the email as a regular image file but usually as some sort of strange link. They also usually have shitty specs, dashes and lines in them. They also seem to load in stages

 

Here is what I'm talking about:

 

Here is one that is purely an image.

 

Here is one that loaded as specs,

 

then loaded the rest of the garbage image.

 

[DosFreak 2]

At work I've just been blocking the IP's. We do use Frontbridge (Microsoft SPAM blocking solution), so they may be blocking some of those types of emails but until I started blocking all of those foreign IP's I would get the above emails constantly every day.

[Philipp 6]

I got tons of these things, but the spam filter of my Mozilla Thunderbird installation already recognized these emails as spam and moved them to the spam folder. I assume any good spam filter with learning capabilities should detect such emails sooner or later.