/etc/cron.d/mailman is in mailman 1:2.1.14-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | # At 8AM every day, mail reminders to admins as to pending requests.
# They are less likely to ignore these reminders if they're mailed
# early in the morning, but of course, this is local time... ;)
0 8 * * * list [ -x /usr/lib/mailman/cron/checkdbs ] && /usr/lib/mailman/cron/checkdbs
#
# At 9AM, send notifications to disabled members that are due to be
# reminded to re-enable their accounts.
0 9 * * * list [ -x /usr/lib/mailman/cron/disabled ] && /usr/lib/mailman/cron/disabled
#
# Noon, mail digests for lists that do periodic as well as threshold delivery.
0 12 * * * list [ -x /usr/lib/mailman/cron/senddigests ] && /usr/lib/mailman/cron/senddigests
#
# 5 AM on the first of each month, mail out password reminders.
0 5 1 * * list [ -x /usr/lib/mailman/cron/mailpasswds ] && /usr/lib/mailman/cron/mailpasswds
#
# Every 5 mins, try to gate news to mail. You can comment this one out
# if you don't want to allow gating, or don't have any going on right now,
# or want to exclusively use a callback strategy instead of polling.
# */5 * * * * list [ -x /usr/lib/mailman/cron/gate_news ] && /usr/lib/mailman/cron/gate_news
#
# At 3:27am every night, regenerate the gzip'd archive file. Only
# turn this on if the internal archiver is used and
# GZIP_ARCHIVE_TXT_FILES is false in mm_cfg.py
27 3 * * * list [ -x /usr/lib/mailman/cron/nightly_gzip ] && /usr/lib/mailman/cron/nightly_gzip
#
# At 4:30AM daily, cull old entries from the 'bad' and 'shunt' queues.
30 4 * * * list [ -x /usr/lib/mailman/cron/cull_bad_shunt ] && /usr/lib/mailman/cron/cull_bad_shunt
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