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

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/