[Dovecot] Director to keep redirecting users to the same server even after all sessions closed?

[Mark Zealey]

Hi there,

Just wondering how easy it would be to make the director continue to 
send a user to the same server (assuming it's still in the pool) for say 
90 seconds after they have last been active (ie lmtp or pop/imap)? 
Basically we are working in quite a heavily cached environment so it 
takes perhaps 60-90 seconds for our imap servers to properly flush to 
our network storage meaning if the user got put on a different server in 
that time we would see some issues. Presently we have fixed proxying, 
but I'd really like to use the director if possible to allow us to more 
easily add & remove servers.

Mark