[exim] Max messages per connection

Hi All,

This is an old issue I have and would like to get feedback on.

several months ago , I have seen error "more than 10 messages received in
one connection". Upon investigation , I increased it to 200 by adding
"smtp_accept_queue_per_connection=200" to config file.

Every now and then , I see same error on log file with new count "more than
200 messages received in one connection" , some of emails get delivered 30
minutes later.

What are options I have to remediate this issue and get mail delivered
immediately ?

Thanks

John