[Mailman-Users] Performance issues with 12K subscribers and 14K subscribers and personalized footers.

Joseph Brennan brennan at columbia.edu
Tue Oct 1 22:05:27 CEST 2013

Worth noting, Mailman is a lot faster if you don't send to 1 at a time.

If they're all at the same domain, like our mass mail to staff and 
students, it is really fast:

  smtp to xxxx for 25570 recips, completed in 39.777 seconds
  smtp to xxxx for 41153 recips, completed in 84.754 seconds

Even if they are at many different domains it does well:

  smtp to xxxx for 2016 recips, completed in 158.363 seconds
  smtp to xxxx for 2199 recips, completed in 701.392 seconds

Joseph Brennan
Manager, Email and Systems Applications
Columbia University Information Technology

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