[Mailman-Users] How to 'export' mailman subscriber list

Mark Sapiro msapiro at value.net
Tue Dec 14 20:01:44 CET 2004

Easy wrote:
>I will use the list of subscribers to set up a new mailman listserv - in 
>hopes a new setup will resolve the issue of not all subscribers 
>receiving the daily email.

It is very unlikely that this will fix your problem since, based on
your descriptions, it doesn't seem likely that this is a list settings
or subscriber settings issue.

You write in another thread:

>If it was only Earthlink and AOL there would be a pattern. There are 
>numerous other ISPs not getting the email sent and some, on all the 
>ISPs, seem to be receiving the emails. This does NOT seem to be the case 
>of an ISP rejecting ALL of these emails sent to their subscribers.

If it is the case that all subscribers not receiving mail are in a
domain (ISP) with a large (whatever that is) number of other
subscribers, it is quite possible that the outgoing MTA is delivering
the message to these domains in a few transactions and the
transaction(s) with the larger number of recipients is/are not being

As an example (this is total conjecture just to illustrate my point)
suppose there are 30 aol.com subscribers and the outgoing MTA delivers
the message to aol in two transactions, one with 20 recipients and one
with 10 recipients and aol has a rule that any message with more that
15 recipients is spam and is discarded. If this were the case, 10 aol
subscribers would receive the mail and 20 would not.

If this is the reason, the only way to address this within Mailman is
to have mailman deliver the message to the outgoing MTA in
transactions containing fewer than 15 (or whatever small number works)
recipients. It would be much better to address this in the MTA, but in
Mailman one way to do this would be to set


in mm_cfg.py. I have no idea how this translates to cPanel. This would
increase the impact of delivery since mail to 600+ recipients would
now be sent in 40+ transactions instead of 2 with the default
SMTP_MAX_RCPTS = 500, but it would insure that the outgoing MTA never
delivered to more that 15 recipients in one transaction.

A much better way to deal with this is to work with your provider to
examine the Mailman logs and the MTA logs and figure out whether posts
are being sent by Mailman to the outgoing MTA for all 600+
subscribers, what the MTA is doing to deliver the posts to the
recipient domains, whether errors are occurring in that delivery, ... 

Mark Sapiro <msapiro at value.net>       The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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