Is there a way to block emails that have no real text, just images that are pulled in from embedded html code referencing them. This is the majority of spam messages that are getting through the spam filter.

Thanks....

There is usually no text at all. It is just images that get loaded via html referencing them from an offsite location. Will the SpamFilter look for words in the html or does it only look at normal body text? Could I put the image name it is referencing in the keywords or attachments list and block it?

Thanks...

I usually add the domains in the URL's referenced within the HTML code to my keywords black list.  Some of these types of email appear to be from the same source (advertising with the exact same image only with a different file name each time) and appear to be using randomly generated domain names with random IP sources and from addresses, meaning they are most likely coming from zombie systems, systems infected with some sort of spyware/mass mailer worm being remote controlled by spammers.

With a lot of these, they appear to have the same or similar subject lines.  Also, I recently added "unsubscribe.php" and a few other commonly referenced php files to my black list in an attempt to thwart these types of spam that seem to be making it through.  The adult stuff is the most worrisome as we pay particular attention to any of that slipping through to our business clients.