[Exim] Configuration advice

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Hi,

I just started using exim. Coming from Postfix I was hoping to make use of
exim's connection caching. I handles for clients that send time sensitive
information. If it isn't sent in a day then it's disgarded. The amount of
emails is around 2million per day and it's outbound only. About 200,000 are
sent to a Postfix box next to it. I'm off redundant 10gigabit pipes
(ethernet card is only 100mb tho) on a Celeron 1.2ghz - 512meg ram - Redhat
7.2 ext3 box. I modified the exim source to remove the fsync's.

From reading the docs and browsing the list archives I came up with the
below config. Otherwise my config is pretty stock. Unfortunately, email
doesn't seem to go out as fast as I had hoped and I can't seem to tell if
connection caching is working. How can I tell?

Also, are there any recommendations that could be made to my modifications
below? Any help, pointers or further search terms for the list archives
would be greatly appreciated.

Regards,
Dale

Changes made to config file: (i use exim -bd -q1m)

split_spool_directory = true
delay_warning = 0s
remote_max_parallel = 10
queue_run_max = 600
queue_smtp_domains = aol.com, yahoo.com, email.com, mail.com, runbox.com,
hotmail.com, everyone.net, eudoramail.com, atozasia.com, boxfrog.com,
yahoo.co.uk, outblaze.com
smtp_accept_max = 200
smtp_accept_max_per_connection = 10000
move_frozen_messages = true
retry_interval_max = 20m


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