IMP GNUPG signing emails??

[Harry Hoffman]

Hey All,
  I was just searching the lists on MARC looking for an answer and was
unable to find anything. Is anyone using PGP/GNUPG to sign/encrypt emails
that are sent from IMP.
  I'm picturing something like an LDAP/SQL db to hold public/private keys
of users and having IMP use these to encrypt/decrypt emails for users.
  I know that there are some inherent security problems with this sort of
setup but I wonder if maybe anyone else out this has this idea or is
currently using it?

Thanks,
Harry