[Mimedefang] How to save certain emails on the server, with delivery

[Jason M. Burnett]

Hi

I'd like to be able to save certain incoming emails to disk on the mail
server while still delivering it normally.  I have a
sendmail/mimedefang/spamassassin gateway (no local delivery) and for
emails with a certain spamassassin score, I'd like to store them
temporarily for analysis.

I need to be able to save it mbox-style, not split into pieces like
quarantining does. 

Any ideas?  It sounds like a job for a second milter, i.e. pipe the
email through another filter *after* mimedefang has added the spam score
header.
But I have no idea how to go about doing that.

--
Jason

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