sendmail with dovecot with nologin account

[David Banning]

I am using dovecot imap and I am having a problem directing mail to 
go to users in Maildir format when they do not have a login shell.

It seems that the .procmailrc file is ignored and the mail is put 
in mbox format into /var/mail

For mail-only users with-out a shell, what is the best way to direct
mail to them in Maildir format within ~/Maildir - maybe directly from
.forward?