[Mailman-Users] Max Number of Addresses in Lists
Jeffrey M. Kenton
jkenton at iastate.edu
Tue Dec 4 17:50:22 CET 2001
I just got off the phone with the director of external information
for my college. She wants to know if our existing system (Mailman)
will handle lists that contain "between 4500 and 7000 email
addresses." They want to set up an alumni newsletter email list so
they can distribute information about programs, events, etc.
This potential number of emails far exceeds, by a considerable amount
(~5x), the number of email addresses on the largest list that I
currently maintain. I do not have any fear that the individual
components in the chain (mailman and sendmail) can handle the load,
but I wonder about the hardware I might need.
I imagine that there will also need to be a significant amount of
tweaking to my sendmail configuration to allow it to efficiently
handle a sudden request to handle up to 7000 outgoing emails. The
emails will also have attachments, most probably, and could be very
large (~300K each). Approximately 200MB of outbound bandwidth per
message to those lists is a frightening specter...
Of course, I am only thinking of the worst case. I would hope that
most of the emails to the list will be referrals to URLs, email
I am hesitant to answer this question immediately, because my mail
server was once shut down by our central IT group because I was
sending out ~10 000 emails. However, at that time, I was using THEIR
outgoing SMTP server, and this time it will be all coming off mine.
If someone who reads this list has set up such huge volume lists,
could you please respond to me directly as well as this list so I can
pick your brain a little?
Jeff Kenton College of Education Tech Support
N058A Lagomarcino jkenton at iastate.edu
Ames, IA 50011 515 294 0228
"Security is a process, not a product." - Bruce Schneier
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