I asked "What is the proper mailcap entry to view html attachments?" and the reply was (thanks to ilf):
text/html; w3m -I 'iso-8859-15' -T text/html -dump; copiousoutput In case there is another newcomer besides me out there, I'll document how I implemented this solution. The text-based web browser w3m can be installed on Mac OSX 10.6 (snow leopard) by using Macports (http://www.macports.org/). Download and install the macports (formerly darwin ports), and then go to http://w3m.darwinports.com/ to install w3m. If you get an error message "can't find package Pextlib 1.0" then go to … http://www.celsius1414.com/how-to-fix-cant-find-package-pextlib-1-0-in-macports-installation … and follow the directions for installing a more current version of Pextlib.dylib. After doing that, the installation worked for me (on MacOSX 10.6.3). Pete -- Peter Stoddard