Beginning with nginx

[ram]

Hi,

  I have been trying to look for a good proxy server in order to prepare
to scale my POP/IMAP services

For 40k pop users with around 700 simultaneous connections we are having
a single cyrus server, and that is not able to handle any more load

Users are increasing and I am thinking of putting up another POP server
to share the load and have a nginx server in front. 

I have a basic question 
Can I use nginx and one of the real servers on the same machine for
pop/IMAP. 


Thanks
Ram