Dovecot infrastructure

[Sami Ketola]

> On 7 Aug 2017, at 10.14, Simone Marx :: Edinet Srl <simone at edinet.info> wrote:
> 
> Hi,
> I would need some suggestion for a dovecot based mail infrastructure.
> Actually, only one server (with dovecot sendmail amavis spamassassin clamav etc etc) is no longer enouth, so I thought I would put on a more complex infrastructure on different servers.
> 
> But I do not know a few things.
> I was thinking about partitioning users on 3-4 servers with dovecot (imap / pop3) and dovecot-lda (no networked filesystem between them) and then configuring 1-2 servers with dovecot director and 1-2 servers for SMTP with postfix.
> It is not clear how the director will map user -> server to be used and, in a user virtualization context (maybe on MySQL) what is the owner / permissions I should give to home folders where I will store mail


TBH, if you really are going to have standalone backends without any shared storage 
and you are going to bind users to specific backend then you are better off without
director layer. Instead you should use dovecot proxies to forward the connections
(imap/lmtp) to specific backend from there.

Sami