September 2025 - Mailman-users - lists.mailman3.org

Block members from sending cc's and bcc's
by Cathryn McGuire Oct. 26, 2025

Oct. 26, 2025

Hi everyone, Using Mailman 3 with Affinity web interface and we want to stop our members from sending to cc: or bcc: We've found the Header Filter and cc and bcc appear in it. Tried to configure it to "hold for moderation," but it hasn't worked. Partly because we don't understand what to put in the Pattern input box. I put in cc: because it requires something. Can anyone advise? Cheers, Cathryn

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default processing
by Sam Darwin Oct. 13, 2025

Oct. 13, 2025

Notice the repeated use of the word "default" (which is a great word, by the way). This creates confusion: Default action to take when this member posts to the list. List default -- follow the list's default member action. Default Processing -- run additional checks and accept the message. Due to backwards compatibility it may be difficult to change. But if it could be modified, how about: Action to take when this member posts to the list. List default -- follow the list's default member action. Standard Processing -- run additional checks and accept the message. In other words, in the context of message acceptance, the word "default" should have a certain selected meaning. Then make extra effort to choose other words for other actions, as proposed here, "Standard Processing", or something similar.

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Sendgrid experiences
by Andrew Hodgson Oct. 6, 2025

Oct. 6, 2025

Hi. I am temporarily using Sendgrid now on my Mailman instance. Initial observations have been positive. A list with 100 users is racking up email delivers though, I am on the basic paid account which gives me 50k emails per month. I was hoping to use a cheaper provider and pay overage costs per email on the assumption that I'm seeing a spike in traffic today because people have started getting the messages again. Sendgrid is maintaining the Message-Id header which is good for archiving. It is re-writing the Return-Path header though which means that bounce handling in Mailman won't work, but I think all the services do this in some way so I am happy to live with that for the moment. Hope this helps. Andrew.

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Login confusion
by Markus Grandpré Oct. 2, 2025

Oct. 2, 2025

Dear list, We've encountered an issue with Postorius after migrating from Mailman 2.1. It appears that Postorius is treating email addresses with differing capitalization as distinct user accounts. For example, <markus.grandpre(a)uni-konstanz.de> and <Markus.Grandpre(a)uni-konstanz.de> are being recognized as separate identities. This is causing significant confusion. Users registered with one capitalization pattern are not seeing the list subscriptions and settings that were previously associated with their account (imported from Mailman v2.1) which used a different capitalization. Is there a known configuration option or method within Postorius (or Mailman 3 itself) to normalize or unify account identification, effectively treating email addresses as case-insensitive for account matching? We need a solution that ensures users see their correct list memberships regardless of the capitalization they use when logging in or that was used during the original Mailman 2.1 import. Thank you in advance Markus -- Markus Ludwig Grandpré Universität Konstanz Kommunikations-, Informations-, Medienzentrum (KIM) Abteilung IT-Dienste Forschung und Lehre, B803, Tel: ++49 7531 88 4342

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Auto discard after max_days_to_hold not working.
by Hitashi mancho Sept. 30, 2025

Sept. 30, 2025

Dear all, I have migrated around 300 mailing lists from Mailman 2 to Mailman 3. In most of the mailing lists we have configured "max_days_to_hold" to 2. It was working fine in Mailman 2. However, it is not working in Mailman 3. Mailman version: GNU Mailman 3.3.10 (Tom Sawyer) Python 3.11.9 Rocky Linux 9.5 Crontab: @daily /opt/mailman/venv/bin/mailman digests --periodic 00 08 * * * /opt/mailman/venv/bin/mailman notify * * * * * /opt/mailman/venv/bin/mailman-web runjobs minutely 0,15,30,45 * * * * /opt/mailman/venv/bin/mailman-web runjobs quarter_hourly @hourly /opt/mailman/venv/bin/mailman-web runjobs hourly @daily /opt/mailman/venv/bin/mailman-web runjobs daily @weekly /opt/mailman/venv/bin/mailman-web runjobs weekly @monthly /opt/mailman/venv/bin/mailman-web runjobs monthly @yearly /opt/mailman/venv/bin/mailman-web runjobs yearly Please guide me in this regard. Regards, Hitachi.

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Managing mailman3 via curl (using bash-scripts or perl-scripts)
by Christian Schneider Sept. 30, 2025

Sept. 30, 2025

Hello Mark, hello Stephen, sorry for bothering again...but the amount of documentation is overwhelming... Some info about my setup: I run mailman3 in an virtual environment with postgresql-Server (all in recent versions) - operating system Ubuntu 24.04-LTS. My aim is to provide one high-level script for the daily task of list creation. - list creation via command-line script with two/three parameters like: ./create-list --listname myfirst.list(a)lists.example.org --admin-email admin-user(a)example.org [--admin-name "Peter Rabbit"] The create-list script itself should be a bash- or perl-script (I am not very familiar with python - SORRY ;-) ) I would like the scripts to trigger some curl-calls on the mailman server (from outside the mailman shell and even from outside the virtual environment) Reading the RestAPI documentation here: https://docs.mailman3.org/projects/mailman/en/latest/src/mailman/rest/docs/… several questions arise: 1) Can I succeed with this plan? (Are curl-calls sufficient? Is it possible from outside the virtual environment?) 2) Is this a viable curl-call to create a user?: curl -X POST -u 'admin-user:<password>' -H "Content-Type: application/json" -d '{ "email": "peter.rabbit(a)example.org", "display_name": "Peter Rabbit", "password": "secret" }' http://localhost:8001/3.1/users 3) and in a second step can I assign this user to a list as owner with a curl-call like this?: curl -X POST -u 'admin-user:<password>' -H "Content-Type: application/json" -d '{ "list_id": "newsletter.lists.example.org", "subscriber": "peter.rabbit(a)example.org", "role": "owner" }' http://localhost:8001/3.1/members 4) What about the commits that are used while operating in mailman shell? (Do I have to trigger commits while operating via curl-calls? And how can I trigger commits via curl?) 5) In the unlikely event that I change from the dark side to the good side i.e. "python programming" ;-) is there a "to-the-point" reference for IListManager, IUserManager etc. giving available functions (with parameters) in a kind of list way? (the example kind of documentation referenced above is good, but where can I find a list of all functions?) 6) I think the starting point for managing lists with python is here: https://docs.mailman3.org/projects/mailman/en/latest/src/mailman/commands/d… right? 7) Going the python way will require to enter the virtual environment, right? (otherwise the libraries, environment variables etc. are not available...I think) Thank you for some guidance here... :-) Kind regards Chris

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Reg Archive Inactive Status
by nirmal＠iitm.ac.in Sept. 29, 2025

Sept. 29, 2025

I am sending the mail to lists. But in Archive It is showing inactive and no mails are there in archives. Kindly help in this regard.

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LDAP Authentication in Mailman3
by nirmal＠iitm.ac.in Sept. 29, 2025

Sept. 29, 2025

Sir, Please give me the steps to configure the LDAP Authentication in Mailman3. Thank You

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How well does DMARC mitigation work nowadays?
by tom＠tomsmyth.ca Sept. 28, 2025

Sept. 28, 2025

Specifically the kind where all list emails come from the the same address, with the sender in Reply-To? It seems like this /should/ be the way it works. Isn't that what Reply-To is for? Do some email clients still mess it up? If they do, wouldn't it make sense to just send them a bounce notice and tell them to clean up their act? Context: considering moving to a paid email service like Mailgun or Twilio and having random unverified email addresses in the From: header seems to be a nonstarter for them, which makes sense.

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CSV Export in Postorius only export email addresses but no names
by Flo Sept. 28, 2025

Sept. 28, 2025

Hi, I want to export the addresses of a mailing list in Postorius. At the List Members section I found 'CSV Export'. However it only exports the email addresses without the names. Is there a trick to make this happen? Thank you. Flo

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