[Mailman-Users] Administrators being unsubscribed by bounce processing

[Chris Whip]

Hi, folks.

One of our customers runs an announcement list with 10,000 subscribers.
He requires approval for subscription and gets notices of subscribes
and unsubscribes. This all adds up to a bundle of administrator mail.
(No, I don't know why he wants it all, but that's his concern.)

His mail servers are fairly reliable, but occasionally throw a "Service
unavailable". On average, this happens about once a day, which is not a 
big deal percentage-wise.

Recently we moved from 2.0.13 to 2.1.4, and the admin mail addresses began
getting routinely unsubscribed due to bounces after a few days.

I suspect the problem is that admin mail bounces appear to go through bounce
processing, and bounce processing does not take into account the number of
successful mails to an address when deciding to cut someone off. This means
that bounce processing does not scale with mail volume to an address.

We have had to deactivate bounce processing for this list pending 2.1.5.
The proposed probe behavior should help, but if the mechanism for invoking
it is as broken as it seems, probes will be sent far too often - often
enough for the probe failure risk to be a problem.

Cheers,
-- Chris Whip

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Chris Whip - Systems administrator, Drizzle Internet NW - chrisw at drizzle.com