[Dovecot] Clustering dovecot?

[dovecot at corwyn.net]

At 04:21 PM 5/27/2009, you wrote:
>On Wed, 2009-05-27 at 14:02 -0400, dovecot at corwyn.net wrote:
>yes, and use NAS  not SAN

Why NAS and not SAN?

>you could also use DNS load balancing in a away that has  0 cache TTL on
>MX addresses, thats better than a software based LB if you cant afford a
>hardware LB

I'm not sure I understand that. The MX records have little to do with 
Dovecot richt (as that would be where things look for the SMTP 
record), which would be inbound mail which is handled by the SMTP 
server (in my case postfix).

I can see load balancing DNS for what the IMAP server is, but why the 
MX records?

Rick