- Mailman-users - lists.mailman3.org

HSTS Missing from HTTPS Server
by jkoral＠luc.edu Sept. 17, 2025

Sept. 17, 2025

In my configuration, I am using Apache to reverse proxy the requests to a uwsgi. After our security office scanned the server, it was shown that HSTS is missing from the HTTPS server. The instructions say to add some lines to /etc/apache2/sites-enabled/. The only file in there is 000-default.conf that holds the configuration, but the VirtualHost is port 80. I am using an F5 to to automatically redirect port 80 to port 443, but it is still showing this vulnerability. My question is, how can enable the Virtual Host for 443 on the server? Or can that configuration be located somewhere else? Or can I just create a new Virtual Host with the added configuration for mailman? Thanks, Joe Koral

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How to subscribe members without sending unsubscribe message
by Flo Sept. 16, 2025

Sept. 16, 2025

Hi, I need to remove subscribed members without sending them an unsubscription message. Despite of my research I haven't figured out how to do this using the GUI. Can anyone help? Flo

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Problems with SPOOFED_UNAUTH
by M.Ede Sept. 15, 2025

Sept. 15, 2025

Hello everyone, I use mailman together with mailcow and have configured my mailing list as follows: - Anonymous list: Yes - DMARC mitigation action: Replace From: with list address - DMARC Mitigate unconditionally: Yes My problem is that my emails are not being accepted by mailcow (rspamd) with the error SPOOFED_UNAUTH (50.00) In the out-queue of mailman the headers look like this: [QUOTE] Authentication-Results: <my.mailserv.er>; dkim=none; spf=pass (<my.mailserv.er>: domain of sender(a)t-online.de designates 194.25.134.81 as permitted sender) smtp.mailfrom=sender(a)t-online.de; dmarc=pass (policy=none) header.from=t-online.de ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=lists.<list.domain>; s=dkim; t=1757400255; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=zmDaIaGeCj1IT8TuP4aJmXRbfyNHV3LqjIfHveVMS0M=; b=Im4F/mpchty4CJvvcW4ZqxMl0BRNnybjcmkPboUSuodopd7nOXaesj3w6kgIwZkLHn1uHY FOiSSjyfZ8Zu0/w4l4Du5uoij2qDCEYHvGFhEugFizE9HJ71i7x0SzoEVSZ9uve6sqnWaE X8+GqtCE+vf0TLLeKhXKHJaBdltbMSqO+QT0BOlbmOdvmUCy6MIqysocTod9io5/+CQOgd SSvsSdDq00CG1IBUsg0Tm2rSf/L2bpGD3bl7QEBKS2id7NeLFM/Zme/3mkHo0N/u7m47xy XSLS9R0C3Kg/YxHY8ctPt7Yas6fwYfzGAOXRvVJz1eeXSrl8B5vWfzJ8+WrE5Q== ARC-Authentication-Results: i=1; <my.mailserv.er>; dkim=none; spf=pass (<my.mailserv.er>: domain of sender(a)t-online.de designates 194.25.134.81 as permitted sender) smtp.mailfrom=sender(a)t-online.de; dmarc=pass (policy=none) header.from=t-online.de ARC-Seal: i=1; s=dkim; d=lists.<list.domain>; t=1757400255; a=rsa-sha256; cv=none; b=yrD6cRE7c/L/v8D76U5Ohn57/MJ7/VsObkzQdAHbFny5DbyEO8pZvM0VCVYA5hUGXqoqoU nnKpEW6/CqvNIZmsS9hKzQQEdO5yIzNnyYjARcW5w5MpAlkMjmH3dQ68mLIS9SUyXUsoXj m1zAeYmdTjZWQOiYanaNJLRuxCWSFQHOpAljZe/lZt+4llNNA01YqirqGBRe6uMaJoebe6 2ubsHTr6VlfTrBrdFqLLSWyRBls+e0JwOd2jGahaQ6/ZIf4l1dOqdaUHSq31RjEDAiofmK IGeKC97iu3r9LiFsjICyi+/yedMGbwSeyyFMzz+cAV7wM84eWfSx2S2kPP1c9Q== [END QUOTE] When the email arrives at rspamd for verification, the DKIM header is added, but there is also the entry: arc=reject ("signature check failed: fail, {[1] = sig:lists.list.domain:reject}"): [QUOTE] DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lists.list.domain; s=dkim; t=1757413251; h=from:reply-to:subject:date:message-id:to:mime-version:content-type: content-transfer-encoding:content-language:list-id:list-help: list-owner:list-unsubscribe:list-subscribe:list-post; bh=jH/b69qzW7O+s5h3yE2MxKTwFLElX7b39ILc9yHGhkc=; b=AApU4mb2iuN9u1lYTrIKIcPnB4jzXDX+8vC+2/WwHC8JvCukiR2Std5k3E10cuAyYFhPVk zn6AWY+s6c6HKslDn0RiO3i9QYRLAY5MESxvj0tKO1dKDMz+A8RdcOf4kdO4hDr0DQBf7v yQLLnLjgK8QpZdW8MrlfxcQpQ9XrlyP2GX+ntFh5vDl7frNPXQfnBMoo+l0DIs6SWQuaFX ikrOiISYKugL8TmWXnGohXiAM84W/JT0lvP/Lmt3NjxlyNsAWpHQz736LphydY4r5/JjHI of99pRcbTvEmkZogthHFaXMOG2sDGxGwlIc3+oIUHoXqyY+VLsBQs8FzjR+eaw== Authentication-Results: <my.mailserv.er>; arc=reject ("signature check failed: fail, {[1] = sig:lists.list.domain:reject}") ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=lists.list.domain; s=dkim; t=1757413249; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=QSqNoTMweT1jo6F77TLHa+Nh7a0n/g9qDOsUTT8KpQ4=; b=rDgMC26uNsyTPgmddqQOiUsJh25KUa69TeMJfekVn5sFOnvhQdoa9LCogRMMKzJomA0wu6 CCdi6jGJpjtJdzB7PQ8UhQbeFiOUy9JNswFxQ+Qk1GXBxgN892C6KL/DiB/VW1j1nL0xOk Tc0BNC1zH1/MG2hB332t6u/rjWO+PtxIznAdcCP29AhO39RWWY/J0c/CHCOoqFYKCEf1ZH J4Wqeu9ANF44cPwopuJzJioWts6JKRvAM5TjnInZ+HaSv5QmuHvdI0fWvh272O3vGfvEPc iG1QsJS9XWpzkymRjYWo6h1c4/eY7eZd4FEzSR/TtW6Ud9b04A5lUmPpEvTxlQ== ARC-Authentication-Results: i=1; <my.mailserv.er>; dkim=none; dmarc=pass (policy=none) header.from=t-online.de; spf=pass (<my.mailserv.er>: domain of sender(a)t-online.de designates 194.25.134.20 as permitted sender) smtp.mailfrom=sender(a)t-online.de [END QUOTE] What am I still doing wrong? Can you help me, which setting is still missing? What informations are you still missing? Thanks for your help, Matthias

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Internal Server Error: /mailman3/postorius/lists/.../held_messages - humanize: where to put?
by Flo Sept. 15, 2025

Sept. 15, 2025

Hi, I have setup in Debian Trixie mailman3-full and came that far, that I have created a mailing list. I can sent emails to the members. However when I send from an email which is non-member the message is held. If I want to accept this message as list admin, I get: `An error occurred while processing your request.` And I get an email: `Internal Server Error: /mailman3/postorius/.../held_messages TemplateSyntaxError at /postorius/lists/.../held_messages 'humanize' is not a registered tag library. Must be one of: account admin_list admin_modify admin_urls allauth bootstrap_tags cache compress d_gravatar date_helpers debugger_tags decorate gravatar highlight highlighting hk_generic hk_haystack i18n indent_text l10n log markdown membership_helpers more_like_this nav_helpers p_gravatar pagination postorius_helpers rest_framework socialaccount static syntax_color tz widont Request Method: GET Request URL: https://.../mailman3/postorius/lists/.../held_messages Django Version: 4.2.23 Python Executable: /usr/bin/uwsgi-core Python Version: 3.13.5 Python Path: ['.', '', '/usr/lib/python313.zip', '/usr/lib/python3.13', '/usr/lib/python3.13/lib-dynload', '/usr/local/lib/python3.13/dist-packages', '/usr/lib/python3/dist-packages', '/usr/lib/python3/dist-packages/setuptools/_vendor'] . . .` humanize is in the INSTALLED_APPS section in /usr/share/mailman3-web/settings.py. In this file I I configured Django. However it's not in the Python path as written in the error email above. So maybe I have to find a different settings file. Can anyone advise me where I can find the error I have in my configuration? Thanks in advance. Flo

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Postgres upgrade from 13 to 16?
by Dave McGuire Sept. 14, 2025

Sept. 14, 2025

Hi folks, we're running a decent-sized MM3 server backed by a Postgres database server that is also used by a number of other applications. It's currently running Postgres 13, and we are looking at upgrading to 16. Can anyone tell me what the implications of such an upgrade be in the context of Mailman3? Any gotchas? Thanks, -Dave -- Dave McGuire, AK4HZ New Kensington, PA

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2.1 -> 3 migration without mboxes?
by David Romerstein Sept. 12, 2025

Sept. 12, 2025

Hey, folks. I've searched the list archive but haven't found a relevant thread yet. Any pointers would be helpful. I have a handful of lists in a 2.1 instance for which I have web archives but not original .mbox files. Is there a way to migrate those lists, including the years of archives, to 3?

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Issues sending to gmail and yahoo e-mails
by jkoral＠luc.edu Sept. 12, 2025

Sept. 12, 2025

Has anyone experienced recent issues with Mailman3 not being able to send to gmail and yahoo e-mail addresses. I am trying to figure out if Google has our server blocked or not. When I send a manual e-mail from the server, the my yahoo e-mail gets delivered, but the gmail one does not. Here is the message I get in the logs when trying to send to the gmail address from the command line, but I do not get anything when it tries to send from Mailman. 2025-09-09T18:57:09.344493-05:00 lstprdls01 postfix/smtp[3544622]: BE67F1C09AF: to=<jmjk(a)gmail.com>, relay=gmail-smtp-in.l.google.com[173.194.194.26]:25, delay=0.55, delays=0.01/0/0.27/0.27, dsn=5.7.26, status=bounced (host gmail-smtp-in.l.google.com[173.194.194.26] said: 550-5.7.26 Your email has been blocked because the sender is unauthenticated. 550-5.7.26 Gmail requires all senders to authenticate with either SPF or DKIM. 550-5.7.26 550-5.7.26 Authentication results: 550-5.7.26 DKIM = did not pass 550-5.7.26 SPF [lstprdls01.xxx.xxx.edu] with ip: [xxx.xxx.10.33] = did not pass 550-5.7.26 550-5.7.26 For instructions on setting up authentication, go to 550 5.7.26 https://support.google.com/mail/answer/81126#authentication 8926c6da1cb9f-50d8f268ab7si36484097173.142 - gsmtp (in reply to end of DATA command)) I added DMARC mitigation to this list with "Replace From: with list address" and "DMARC Mitigate unconditinally - Yes" The DMARC Address I have in there is ^.*(a)gmail\.com$ Do I have to do anything else? Restart any services or anything?

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Hyperkitty Text/Markdown/HTML
by Sam Darwin Sept. 11, 2025

Sept. 11, 2025

How about a feature to include "HTML" in the current Hyperkitty choices of (Text or Markdown) rendering? A sanitizer must be used to prevent malicious attacks. https://github.com/messense/nh3 . lxml is another package that processes html. A sanitizer would be helpful for more aspects. Permit a limited set of markdown so that messages still appear professional. Gitlab/Github don't allow arbitrary fonts or font sizes, right? Mostly remove these tags. A way that code blocks could be presented: determine an established list of known codeblock styles. Configure the sanitizer to permit this range of fonts or styling elements. By allowing them through the filter, a code styling is rendered. (It is permitted/allowed to be rendered.) Even better, when the sanitizer recognizes the fonts, it replaces them with an "official" set of codeblock fonts. Otherwise, if other font tags are entirely removed, if they are missing, the email client or web ui will decide the font selection, and it will appear "standard". In order for both email clients and Hyperkitty to view the same result, the sanitizer should ideally be applied to outgoing emails as well as rendering in the UI. That means this feature would affect more than just Hyperkitty. (i.e. mailman-core). Although, that could be implemented as a separate step, until which time emails would get a full range of HTML, without sanitizing. In this scheme, ensure outgoing emails are multi-part MIME with plain text and html versions. Some of our users are really in favor of more formatting. Others prefer plain text. Those who prefer plain text have various arguments that HTML messages will be rendered badly, and won't be legible. Questions: 1. Would "multi-part MIME with plain text and html versions both" solve the problem for users who prefer plain text? 2. What percentage of email clients that support HTML formatting when sending will also include a plain text rendering of the same content in the outgoing message? 3. Is it usually the responsibility of a receiving mail client to be able to convert HTML to plain text if the user requests it? 4. When mailman-core receives and then sends out a message, can it receive HTML, generate a plain-text version, and then send both? Thoughts?

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After moving to a another server, mail footers show only this smart text "Cache content lost"
by Wikinaut Sept. 10, 2025

Sept. 10, 2025

After moving to a another server, mail footer shows only text "Cache content lost". I moved the two databases (mailman3, mailmanweb) to another server, but now my Mailinglist shows this in the footer, uh, what did I forget to move?

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Contribution: A small script for presetting member preferences and reset bounce_scores of all members
by Wikinaut Sept. 10, 2025

Sept. 10, 2025

In case you need this, I do. Of course, the shown preferences need to be adapted according to your needs. def reset_bounce_scores(): # reset bounce scores and setting certain standard member preferences to all members in all mailinglists # 20250910 from zope.component import getUtility from mailman.interfaces.listmanager import IListManager from mailman.interfaces.member import DeliveryMode, DeliveryStatus RED = "\033[31m\033[1m" X = "\033[0m" hide_address = False delivery_status = DeliveryStatus.enabled lm = getUtility(IListManager) for mlist in lm.mailing_lists: # print(f"... checking bounce status and setting standard preferences of members in {mlist.fqdn_listname}") print(f"... resetting bounce status of members in {mlist.fqdn_listname}") for member in mlist.members.members: prefs = member.preferences prefs.acknowledge_posts = True prefs.hide_address = hide_address # prefs.preferred_language = 'de' prefs.receive_list_copy = True prefs.receive_own_postings = True prefs.delivery_mode = DeliveryMode.regular prefs.delivery_status = delivery_status bs = member.bounce_score if bs > 0: print(f"reset bounce score of: {member.address.email} {mlist.fqdn_listname} {RED}{bs}{X}") member.bounce_score = 0

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