R: [exim] too many connections problem [unsolved]

After changes I recive the follow message in to log: no immediate
delivery: more than 10 messages received in one connection

through eximstats I see that during the day I have of the peaks of
approximately 1200 mails/hour.

I've setup in to configuration file the follow value:

smtp_accept_max_per_host = 2048
smtp_accept_max = 5120

I've add the follow and at this moment solved it.
smtp_accept_queue = 2048

Which are the values that I must set up in order to make to go in way
express the mail on my mail-relay?

Andrea Balzi