Not to my knowledge, but a script that would use MIME::Tools (specifically, MIME::Parser) to parse an inbound "message", figure out if it's a multipart/alternative message, and drop the HTML component or return the text component, save attachments, whatever, probably wouldn't be all that hard to write.

Perl has the modules to do MIME processing. The hard part would be writing the application and getting the features implemented.

If you're looking to write one of these, note that there are already a billion e-mail clients out there, many done as a "this is my first real program" type of experiments/projects. If that's the direction you're going in, go for it.

These modules seem to be more useful (to me at least) in doing automatic processing of incoming mail, for example, stripping out (or scanning, whatever), say, HTML components to messages, or certain types of file attachments, etc.