[Dovecot] removing html via dovecot/sieve

is there a howto or similar for configuring dovecot as a user to strip mime.

ideally i would like all html copies deleted,

but graphics, etc dumped to ~/public_html and replaced with a url.

i have a super crappy link so html, etc usually jams my spool.

i can usually wget things however hence this desired approach.

bonz.