bottleneck I think one server for smtp + pop3/imap is enough and you
And there is the problem!
I have configured ONE inbound "courier-mta-ssl" and curently FIVE
"courier-imap-ssl" since I have too much $USER accessing the IMAP
at the same time. Arround 600-1400 $USER of over 17.000 Accounts
but increasing.
The mailboxes itself are on 5 seperated NFS-Servers.
I have setup a round robin for <mail.mydomain.tld> for the IMAP
Servers but it does not realy work, specialy if $USER use the
Webinterface on <webmail.mydomain.tld> which use 2 Servers currently.