Calling a different mail delivery program in qmail

[Steve Quezadas]

I am trying to configure dmail (part of WU imap-utils set of utilities) so
that I can have qmail deliver in mbx format instead of the very ugly mbox
format. ANyway, I was told that dmail works the same as other mail delivery
programs like /bin/mail, mail.local, etc and that I would have to have qmail
call a different mail delivery program so dmail can be used.

Does anyone know how to call a different mail delivery program under qmail?

- Steve