mail_crypt not working on incoming messages?

[Dave]

>> Dovecot cannot magically encrypt your email, so it has to go thru 
>> dovecot-lda or lmtp. Procmail can call dovecot-lda, if you don't want 
>> to migrate to using sieve.
>>
>> Aki
>
For anyone interested, I was able to get the encryption working on 
incoming mail on my test machine using the "procmail calling 
dovecot-lda" method Aki mentioned above.  This functionality could be 
made system-wide by using /etc/procmailrc, I would guess, but I just did 
it on a per-account basis using .procmailrc in the user's home folder:

-------------------[ .procmailrc ]------------------------
MAILDIR=$HOME/Maildir
SHELL=/bin/bash
DELIVER=/usr/lib/dovecot/dovecot-lda

:0
| $DELIVER
---------------------------------------------------------------

I will continue to investigate the other methods though, as I know sieve 
is more modern and I'm also interested in the LMTP functionality.  
Thanks again for the the help.