Cyrus and Postfix on separate machines -- how?

[Jorey Bump]

Rich Wales wrote, at 11/23/2007 11:05 PM:
> I currently have both Postfix (2.3.5) and Cyrus (2.3.9) running on
> a single server.  Postfix does its thing (including spam and virus
> filtering) and then invokes Cyrus's "deliver" program to deliver
> messages.
> 
> I would like to move my Cyrus onto a separate system from my Postfix.
> The reason is because I'm having problems with my Cyrus and want to
> try setting up a new version of Cyrus (2.3.10) on a different platform,
> but I would prefer to keep my working Postfix setup where it is for now.
> 
> What's confusing me here is that I'm not sure how to configure Postfix
> so it can deliver a message over my LAN to a separate Cyrus server,
> instead of delivering it over a Unix-domain socket to Cyrus running on
> the same box.
> 
> Any suggestions?

Use LMTP. See lmtp(8) for more details, but you'll probably use 
something like this in main.cf:

  mailbox_transport = lmtp:inet:mail.example.com

And enable lmtp in cyrus.conf on the destination:

  lmtp         cmd="lmtpd" listen="lmtp" prefork=0