Receiving email into pl/sql

I've sent email from pl/sql with utl_smtp and with 10g's utl_mail; but 
now I want to do the inverse, i.e. I want to READ email from pl/sql.

The idea is to set up a dedicated email account. Users could send 
stereotyped messages to that account, and the pl/sql routine would read 
the mail, parse the messages and do the needful.

As far as I can tell, utl_mail will send, but not receive email.

I can think of some Rube Golberg workarounds but can anyone point the 
way to a "no fuss" way to read simple text emails?


Thanks in advance