smart mail processing

[Alex V. Toropov]

Hi, all !

I have a problem with some "text only MUA", which is used on one of mail
accounts.
So I'd like to analyze all mail coming on said mailbox and if it contains
anything
else than plain/text, put into another mailbox, and send some "text
notification letter"
to problem account.

Haz anyone ideas, how can it be done on qmail MTA ?

TIA, Alex