[bovine3dom]

Similar to the other child comment: elinks can format HTML as plaintext.

I have this as my .mailcap and it Just Works (TM) with mutt:

  text/html;  elinks -dump %s; nametemplate=%s.html;          copiousoutput

[JetSpiegel]

You can also use pandoc, I had better results with this:

> text/html; iconv -f %{charset} -t UTF-8 | pandoc -f html -t plain --wrap=preserve; copiousoutput; nametemplate=%s.html; description="HTML eMail";