[Dovecot] LMTP, TLS/SSL, authentication, proxy

[Jogi Hofmüller]

Folks,

Several questions packed into one email ;)

Can dovecot use TLS/SSL on LTMP inet socket?

Can I configure dovecot to only let an authenticated user deliver mail 
via LMTP?

Can I tell dovecot to use a user/password for proxying LMTP connections?

All this is related to my quest to move from cyrus to dovecot 
transparently to our users.  And if any of the above questions can be 
answered with yes, I would appreciate the odd hint on howto configure 
that :)

Thanks in advance!
-- 
j.hofmüller

aka Thesix                                   http://users.mur.at/thesix/