[Mailman-Users] OT - Mailman and Back to the Future

Mark Sapiro mark at msapiro.net
Tue Dec 4 04:34:29 CET 2012

On 12/3/2012 10:38 AM, Ralf Hildebrandt wrote:
> * Max Pyziur <pyz at brama.com>:
>> I noticed that Mailman-users has emails archived from June 2013 and April
>> 2024; is this a bug or a feature?
>> http://mail.python.org/pipermail/mailman-users/
> One could argue that the archiver shouldn't use the "Date: " provided
> by the sender, but another date.
> But the mails were archived correctly, at least according to their
> respective Date: headers.

For a long time (many years), Mailman has had code in the archiver to do
one of three things. It has a settings which default to


which means if the message's Date: header is more than
ARCHIVER_ALLOWABLE_SANE_DATE_SKEW (15 days) different from the received
date, use the received date. Other possible settings are


meaning always use the message's Date:, and


meaning always use the received date.

The 'future' messages in the mailman-users archive predate this code.
There used to be more of them, but the others are all prior to December

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

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