okomili wrote:
If I have multiple servers running in a cluster, how the incoming IMAP connections will find the correct server when an IMAP client wants to authenticate?
Your cluster software should handle this, not IMAP server.
okomili wrote:
Is there a sort of "IMAP director" HW or SW solution which redirects the incoming connections to the correct server?
Searching in google will give you many useful links.
for example, you can try Dovecot director: http://wiki2.dovecot.org/Director
Or, Perdition: http://horms.net/projects/perdition/
Or, Nginx: http://wiki.nginx.org/ImapProxyExample