URIDNSBL not getting all URLs

[David Birnbaum]

Greetings,

I've experienced a pretty significant upswing in spam over the last few weeks, 
and I finally had a chance to track it down.  Although not responsible for 100% 
of the increase, I found that the URIDNSBL isn't getting all of the URLs it 
should be.

I've tracked this down to the behavior of 
Mail::SpamAssassin::Message::Node::rendered, which seems to be rendering out the 
URIs which should be hitting!  The messages tend to have two parts - a 
text/plain and a text/html.  The text/plain doesn't have any URLs which might 
hit, and the text/html contains the URL which would hit, but doesn't get passed 
into the list of URIs because of how the rendered() routine returns blank HTML.

I was wondering if anyone else has seen this behavior and had any suggestions or 
fixed before I take a crack at patching it.

Cheers,

David.