Hello All

Have a Dual Xeon with 1 Gb DDR running WHM. The following issue has been bugging me for some time now.

1. Off late my cutomers have been complaining that they are receiving some mails few hours LATE. Sometimes the mail does not reach them at all.

It does not show up in SPAM Box, nor does it bounce back. Where could be happening to the mail?

I checked and found that:
Server load is very low. Mail queue is not over 1000 messages. DNS seems OK. Reverse DNS is setup. Exim runs every 30 minutes and settings are deliver_queue_load_max = 4 auto_thaw = 1d ignore_bounce_errors_after = 1d, timeout_frozen_after = 1d

2. Is there a log in WHM where one can check what mails were received and what was done with those incoming mails?

Thanks