On 18. Februar 2014 01:57:26 MEZ, Murray Trainer <mtrainer@westnet.com.au> wrote:

HI All,

I have setup my Dovecot director proxies and Dovecot backend mail stores.  I intend setting up several incoming and outgoing Exim MTA's.  I am a bit confused about what I need to run on the backend Dovecot MTA's to get the incoming mail delivered to them. 

Backend needs to run dovecot lmtp service listening on a TCP port.

Do I need to install Exim on them or use LMTP to receive mail from the MTA's?

There is no need for exim on the backends Delivery can be done by lmtp.

Also, can I directly deliver mail to the mailstores or do I have to go through the director proxies using lmtp? 

You will need to go through director lmtp proxy service in order to connect to the correct backbend. Local delivery should not be used in the director setup. If you deliver locally to the wrong NFS client, you will likely corrupt your mailbox indexes on NFS.

Note that I am using Director with the mailboxes on NFS backed storage.

Regards Daniel