[Dovecot] stripping attachments

[Frank Cusack]

there is a windows tool that strips attachments from emails on the
server.  i think it works for exchange.  is there a tool or a way
to do this for imap?  i don't mean a mail filter that would strip
them before the user sees them, i mean that the user could actively
cooperate to reduce mail storage space, yet keep the original email
on the server sans attachment.