- Mailman-users - lists.mailman3.org

Find all mailing lists a user is subscribed to
by Rodolfo Pilas July 10, 2026

July 10, 2026

Hi, I administer a Mailman 3 server with more than 50 mailing lists. All subscribers belong to the same organization. Occasionally I need to answer questions such as: “Which mailing lists is user(a)example.com subscribed to?” At the moment I iterate over every mailing list, list its members, and grep for the email address. It works, but it is inefficient. Is there a supported way (CLI, REST API, or Postorius) to retrieve all the mailing lists a particular email address is subscribed to, without having to inspect every list individually? Rodolfo Pilas

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Odd behavior: notifications for list membership, etc. from "owner user" sent as "owner user"?
by Thomas Ward July 10, 2026

July 10, 2026

Tracing down an issue of "why are we no longer receiving owner notices" such as list membership changes, moderation list items, etc. we are seeing errors in MS365 side of things about "failing to deliver". Upon deeper trackdown of this, our owner user mailman(a)example.com is seeing messages sent to it from @lists.example.com and @distro.example.com from mailman(a)example.com (despite the From in the envelope being list-bounces+mailman=example.com(a)[lists|distro].example.com) Is there any specific reason for this? Is it because the MS365 side is ignoring the Envelope's From address and relying on the actual *from* field which is breaking things because MS365 users are "not allowed to send as [lists|distro].example.com"? This seems highly suspicious if this is the case, and I want to see if there's anything we can do on the Mailman side of things to make this 'work' for the 365 recipient (mailman(a)example.com is a shared mailbox for the IT team in this case, so it's a legitimate user).

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Nested lists possible
by Flo July 10, 2026

July 10, 2026

There are two kind of members of an organization, general and inner ones. There is a list for the inner members and I don't want to duplicate their names in the general list. I have already put the inner list as member of the general list and it works, however, the subject includes both prefixes and there are also both footers. So, the result is not really acceptable. Are there any other possibilities? Thank you in advance for your help. Flo

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Can disabled users enable themself?
by Flo July 9, 2026

July 9, 2026

Hi, users can get disabled if there are too many bounces. Is there an easy possibility for the disabled users to enable themself on their own? I checked the email they get, however, there is no link. Only the owner's email address. What is the solution in such a case? Thank you for the information. Flo

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Re: Why is it VERPing every message?
by Paul Tomblin June 25, 2026

June 25, 2026

On Tue, Jun 23, 2026, at 8:48 PM, Mark Sapiro wrote: > I don't know what the issue is, but even if you have personalization > off, try setting `verp_personalized_deliveries: no` in case there's some > issue there. Ok, that's weird. `mailman conf -s mta` said it was already set to no, but I added it to /etc/mailman3/mailman.cfg and now it's sending in big chunks. Which now RoadRunner is rejecting because of too many recipients in one message instead of too many simultaneous connections. Can't win with these idiots, can I? -- Paul Tomblin

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Mass subscription: HTTP Error 400: 'pathlib._local.PosixPath' object does not support the context manager protocol
by Flo June 24, 2026

June 24, 2026

Hi, Debian trixie, virtualenv installation: When I entered addresses at the mass subscription field I got: HTTP Error 400: 'pathlib._local.PosixPath' object does not support the context manager protocol The addresses were subscribed though. How can I have subscription working correctly? I haven't found anything reasonable on the Internet. Thank you for your help! Flo

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Why is it VERPing every message?
by Paul Tomblin June 24, 2026

June 24, 2026

So i was going down the rabbit hole of why every outgoing message for a certain 500+ member list is being VERPed, which lead to RoadRunner/Spectrum complaining about too many connections, and I tried to look at the verp configuration: (venv) *mailman@mail*:*~*$ mailman conf |grep verp [mta] verp_confirm_format: $address+$cookie [mta] verp_confirm_regexp: ^(.*<)?(?P<addr>[^+]+?)\+(?P<cookie>[^@]+)@.*$ [mta] verp_confirmations: yes [mta] verp_delimiter: + [mta] verp_delivery_interval: 1 [mta] verp_format: ${bounces}+${local}=${domain} [mta] verp_owner_notifications: yes [mta] verp_personalized_deliveries: yes [mta] verp_probe_format: $bounces+$token@$domain [mta] verp_probe_regexp: ^(?P<bounces>[^+]+?)\+(?P<token>[^@]+)@.*$ [mta] verp_probes: no [mta] verp_regexp: ^(?P<bounces>[^+]+?)\+(?P<local>[^=]+)=(?P<domain>[^@]+)@.*$ I'm quite confused about why verp_delivery_interval is 1 instead of the default 0, and why verp_probes is no. I did make sure that "Personalize" was set to None. I tried to override them in mm/var/etc/mailman.cfg, but it seems to be having no effect, even after restarting mailman. Is this not the correct syntax: [mta] verp_delivery_interval: 0 verp_probes: yes Is something else overriding my mailman.cfg setting? I do have a list:member:regular:footer but it doesn't have any user information in it, so that shouldn't cause it to do the messages individually, should it? ----------------------------- This is the ${list_name} mailing list Description: ${description} To unsubscribe send an email to ${list_name}-unsubscribe(a)browncroftna.org This message in the archives is: $hyperkitty_url -- Paul Tomblin

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mailman command line?
by Paul Tomblin June 24, 2026

June 24, 2026

If I type `mailman` with no arguments, I get the whole (venv) *mailman@mail*:*~*$ mailman Usage: mailman [OPTIONS] COMMAND [ARGS]... *a* The GNU Mailman mailing list management system https://www.list.org Options: --version Show the version and exit. --run-as-root Running mailman commands as root is not recommended and mailman will refuse to run as root unless this option is specified. -C, --config FILE Configuration file to use. If not given, the environment variable MAILMAN_CONFIG_FILE is consulted and used if set. If neither are given, a default configuration file is loaded. -h, --help Show this message and exit. --- etc --- But if I type `mailman -h`, as it says in that page, I get a massive stack dump starting with File "/opt/mailman/venv/lib/python3.13/site-packages/click/core.py", line 1161, in __call__ return self.main*(*args, **kwargs)* ~~~~~~~~~*^^^^^^^^^^^^^^^^^* File "/opt/mailman/venv/lib/python3.13/site-packages/click/core.py", line 1081, in main with self.make_context*(prog_name, args, **extra)* as ctx: ~~~~~~~~~~~~~~~~~*^^^^^^^^^^^^^^^^^^^^^^^^^^* File "/opt/mailman/venv/lib/python3.13/site-packages/click/core.py", line 949, in make_context self.parse_args*(ctx, args)* ~~~~~~~~~~~~~~~*^^^^^^^^^^^* and ending with File "/opt/mailman/venv/lib/python3.13/site-packages/mailman/utilities/modules.py", line 181, in find_pluggable_components for name, plugin_config in config.plugin_configs: ^^^^^^^^^^^^^^^^^^^^^ File "/opt/mailman/venv/lib/python3.13/site-packages/mailman/config/config.py", line 291, in plugin_configs plugin_sections = self._config.getByCategory('plugin', []) ^^^^^^^^^^^^^^^^^^^^^^^^^^ AttributeError: 'NoneType' object has no attribute 'getByCategory' (venv) *mailman@mail*:*~*$ mailman --version GNU Mailman 3.3.11b1 (Tom Sawyer) -- Paul Tomblin

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Server error,An error occurred while processing your request. - SITE_ID
by Flo June 23, 2026

June 23, 2026

Hi, I did the virtualenv installation on Debian trixie. I got mailmanweb running, created a superuser, could login into https://my.site.net/admin (after resolving CSRF errors). I created a new site (my.site.net) in Django, deleted example.com and changed SITE_ID to 0 in /etc/mailman3/settings.py . After restarting mailman3 and mailmanweb services I get Server error,An error occurred while processing your request. when I call https://my.site.net/admin again. Even if I change SITE_ID back to 1 there is no change. What have I done wrong? I haven't found any solution on the internet. And, even more important, how get I get it working again? Thank you for your help. Flo.

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Shutdown problem
by Lars Bjørndal June 22, 2026

June 22, 2026

Sometimes when I reboot the machine, I experience that mailman doesn't start because the files /opt/mailman3/mm/var/locks/master.lck* isn't deleted during shutdown. Maybe one way to solve this could be to use ExecStartPre directive in the systemd service to remove the lock files. What's the best practice to solve this problem? BTW I've noticed that doing `systemctl stop mailman3` takes a very long time, 45 secs. or something like that. - Mailman 3.3.10 - Python 3.12.13 ``` /etc/systemd/system/mailman3.service [Unit] Description=GNU Mailing List Manager After=syslog.target network.target postgresql.service [Service] Type=forking PIDFile=/opt/mailman3/mm/var/master.pid User=mailman3 Group=mailman3 Environment="MAILMAN_CONFIG_FILE=/etc/mailman3/mailman.cfg" ExecStart=/opt/mailman3/venv/bin/mailman start ExecReload=/opt/mailman3/venv/bin/mailman restart ExecStop=/opt/mailman3/venv/bin/mailman stop # Tested, but have no effect on deletion of the lock file. #Restart=on-failure #RestartSec=15 [Install] WantedBy=multi-user.target ``` Lars

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