[Dovecot] Active IMAP sessions per server?

[Brent Bloxam]

Hi,

I'm curious about some of the larger dovecot installs out there and what 
your current active user load looks like per server. Realistically, how 
many active IMAP sessions are some of you maintaining? At what point did 
you find the load became unmanageable? I know there's a lot of different 
factors involved in this, but I'm just looking to get a rough idea of 
what I can expect to be able to handle with dovecot.

Any help is appreciated

Regards,
Brent