[exim] Mailman Slow Delivery

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Author: Ajay Kajla
Date:  
To: exim-users
Subject: [exim] Mailman Slow Delivery
Hello All,

I have been using mailman+sendmail on a CentOS Linux VPS box, with 2 x
Intel(R) Xeon(TM) MP CPU 3.66GHz CPUs, and 2 GB RAM. The list is of around
65000 users.


Form the past few weeks server seems to be very slow in delivering mails. I
have been receiving mailer approximately with 2 hours delay.

*******Mailman is taking 30979.910 seconds for 65660 users*******
Oct 31 10:02:28 2010 (7270) <201010310625.o9V6PY9t028494@???> smtp to
xyz for 65660 recips, completed in 30979.910 seconds

*******Whereas another server with came Specs and configuration is just
taking 12517.834 for larger (79579) number of users.*******


Oct 31 19:10:25 2010 (12027) <201010311653.o9VGrCqX024525@???> smtp to
abc for 79579 recips, completed in 12517.834 seconds


Can you please suggest me how to improvise the performance of mailman or how
about if I want to migrate the mailman from Sendmail to Exim ?

Regards,
Ajay