Comparing 2 mail bodies

From: Tim Dierolf (tidi_at_webde-ag.de)
Date: 06/30/04 

Date: Wed, 30 Jun 2004 16:36:51 +0200

I'd like to compare 2 mailbodies. For example 2 HTML spam mails, looking
identically but with little differences in the body. How can I check if they
are similar or not?

Are there any known doings?

Tim