- Mailman-users - lists.mailman3.org

message duplication and an NNTP related error
by Laurens Kils-Huetten Feb. 24, 2026

Feb. 24, 2026

Good day, I have recently installed mailman3 on a Debian trixie system. While I managed to set up most of it (the mailing lists, postorius and also a working gateway to our inn2 news server) I'm seeing a weird duplication of messages, that seems to be related to the error messages posted below. When I switch off gating to nntp the duplication stops. Also only mail messages are duplicated, not the postings on the news server. Any pointers as to what to look into, or how to remedy this problem are greatly appreciated :) Thanks, Laurens here come the error logs: Feb 23 20:39:08 2026 (2776528) ACCEPT: <e4938b85cbd75c0b04867514fc0b8ad9(a)betola.de> Feb 23 20:39:10 2026 (2776528) ACCEPT: <e4938b85cbd75c0b04867514fc0b8ad9(a)betola.de> Feb 23 20:39:12 2026 (2776530) <e4938b85cbd75c0b04867514fc0b8ad9(a)betola.de> NNTP error for test(a)grenzland.club Traceback (most recent call last): File "/usr/lib/python3/dist-packages/mailman/runners/nntp.py", line 94, in _dispose conn.post(fp) ~~~~~~~~~^^^^ File "/usr/lib/python3/dist-packages/nntplib/__init__.py", line 916, in post return self._post('POST', data) ~~~~~~~~~~^^^^^^^^^^^^^^ File "/usr/lib/python3/dist-packages/nntplib/__init__.py", line 909, in _post return self._getresp() ~~~~~~~~~~~~~^^ File "/usr/lib/python3/dist-packages/nntplib/__init__.py", line 492, in _getresp raise NNTPTemporaryError(resp) nntplib.NNTPTemporaryError: 441 Can't set system Injection-Info header field

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Documentation errors
by Paul Tomblin Feb. 23, 2026

Feb. 23, 2026

On the documentation about migration at https://docs.mailman3.org/en/latest/migration.html, there are two commands that start `python manage.py hyper kitty_import|update_index_on_list`, but there is no manage.py installed if you install Mailman and Mailman web following the instructions. Instead, I was able to run them using `mailman-web hyperkitty_import|update_index_one_list` instead. What is the correct method for reporting these errors?

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Reason for Shunting
by Brian Carpenter Feb. 23, 2026

Feb. 23, 2026

Is there a way to determine why a message keeps ending up in the shunt queue? -- Brian Carpenter Harmonylists.com Emwd.com

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Can't import from Mailman 2.1
by Paul Tomblin Feb. 23, 2026

Feb. 23, 2026

I set up a new Mailman site using 3.3.10, and copied over my files from my old mailman site (using 2.1.34). I created a new domain, and a new list, and tried to import the settings from the old pickle file using mailman import21 pt-test(a)browncroftna.org /var/tmp/var.lib.mailman/lists/pt-test/config.pck (in the virtual environment shell) but I get the following error ``` File "/opt/mailman/venv/lib/python3.13/site-packages/mailman/utilities/importer.py", line 512, in import_config_pck default_value = getUtility(ITemplateLoader).get(newvar, mlist) File "/opt/mailman/venv/lib/python3.13/site-packages/mailman/model/template.py", line 211, in get path, fp = find(default_uri, mlist, code) ~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/mailman/venv/lib/python3.13/site-packages/mailman/utilities/i18n.py", line 157, in find for search_path in raw_search_order: ^^^^^^^^^^^^^^^^ File "/opt/mailman/venv/lib/python3.13/site-packages/mailman/utilities/i18n.py", line 117, in search templates_dir = str(resources.enter_context( ~~~~~~~~~~~~~~~~~~~~~~~^ files('mailman').joinpath('templates'))) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.13/contextlib.py", line 528, in enter_context raise TypeError(f"'{cls.__module__}.{cls.__qualname__}' object does " f"not support the context manager protocol") from None TypeError: 'pathlib._local.PosixPath' object does not support the context manager protocol ``` All I can find on Google is a suggestion that I have a non-empty `bounce_info`, but `dumpdb` shows it as empty.

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Customizing Postorios web templates
by Stefan Bethke Feb. 23, 2026

Feb. 23, 2026

Hi, I have two list servers that I would like customize the web pages for, specifically I need to add some legal information to the footer, and I might want to apply some light branding to the site. I can't find any hints on how to do that, maybe I'm looking in the wrong place? If Postorious does not currently allow that outright, it seems I would need to fork mailman/postorious, replace templates like https://gitlab.com/mailman/postorius/-/blob/master/src/postorius/templates/…, and build the package myself. Is this assessment correct? If so, would there be interest in adding a feature to define some blocks that can be overridden more easily, especially during deployment and without having to build custom Python packages? Stefan -- Stefan Bethke <stb(a)lassitu.de> Fon +49 175 3288861

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Digestion debugging
by John Price Feb. 21, 2026

Feb. 21, 2026

I'm having trouble getting digests to work. When I try to manually send one, it does nothing, and then the digest gets deleted (I guess?). I would love it if the documentation explained a bit more how the process works. How are the files gathered? What file can I backup and later restore if I'm debugging it? Also, how are the digest issue and volume numbers work? Is there any way to control that? Since I've been running digests for decades, can I set the volume and issue to what I want so that the numbering continues from where the other installation left off? Thanks, John -- Why do they lock gas station bathrooms? Are they afraid someone will clean them? Have a great day and don't forget to laugh! http://www.gcfl.net (The Good, Clean Funnies List): Good, clean daily funnies you can safely tell your Mom!

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Error After Posted Message in Archive
by msok＠lalawlibrary.org Feb. 21, 2026

Feb. 21, 2026

Hi All, After I started a new threat and posted message, I received an error. Where should I take a look into this issue? Thanks, Marin

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Try to Implement Template for The message sent to subscribers when a subscription confirmation is required
by msok＠lalawlibrary.org Feb. 20, 2026

Feb. 20, 2026

My NGINX configure redirect for HTTP to HTTPS. For the domain below, mailman.example.com = my actual domain -NGINX config server { # EXTERNAL: Redirects all port 80 traffic to HTTPS listen 80 default_server; listen [::]:80 default_server; # server_name mailman.example.com; server_name mailman.example.com; # no issue for accessing from outside, it will redirect to https return 301 https://$host$request_uri; # Redirect http to https server_tokens off; } # INTERNAL: Listens ONLY on 127.0.0.1 to handle local HTTP requests server { listen 127.0.0.1:80; server_name localhost; location / { include uwsgi_params; uwsgi_pass unix:/run/mailman3-web/uwsgi.sock; uwsgi_param HTTP_HOST $host; } location /mailman3/static { alias /var/lib/mailman3/web/static; } location /mailman3/static/favicon.ico { alias /var/lib/mailman3/web/static/postorius/img/favicon.ico; } -The URL syntax https://mailman.example.com/mailman3/lists/list-id/confirm/?token=$token -The error message when tried to add subscriber HTTP Error 400: HTTPSConnectionPool(host='localhost', port=443): Max retries exceeded with url: /postorius/api/templates/list/list-id/list:user:action:subscribe (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1029)'))) Please help! Thanks, Marin

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Mailman3 Queues Documentation
by msok＠lalawlibrary.org Feb. 20, 2026

Feb. 20, 2026

Hi Everyone, I'm looking for a documentation for the explanation about the Queues in Mailman3. By the way, I'm new, I just got 5 shunt under Queues. Mailman Core Version: GNU Mailman 3.3.10 (Tom Sawyer) Mailman Core API Version: 3.1 Mailman Core Python Version: 3.13.5 (main, Jun 25 2025, 18:55:22) [GCC 14.2.0] Queues archive 0 bad 0 bounces 0 command 0 digest 0 in 0 nntp 0 out 0 pipeline 0 retry 0 shunt 5 virgin 0 Thanks, Marin

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Confirmation emails aren't sent to users.
by Ibiam Chihurumnaya Feb. 18, 2026

Feb. 18, 2026

Confirmation emails aren't being sent to users and there's nothing in the logs that make it obvious what's happening. ERROR 2026-02-12 14:15:11,250 1985547 django.request Internal Server Error: /archives/list/soas(a)lists.sugarlabs.org/thread/CVAUPR7L6AYTNZXIWHQ263A6ZJUROTRC/ 233825 Traceback (most recent call last): 233826 File "/opt/mailman/venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner 233827 response = get_response(request) 233828 File "/opt/mailman/venv/lib/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response 233829 response = wrapped_callback(request, *callback_args, **callback_kwargs) 233830 File "/opt/mailman/venv/lib/python3.10/site-packages/hyperkitty/lib/view_helpers.py", line 137, in inner 233831 return func(request, *args, **kwargs) 233832 File "/opt/mailman/venv/lib/python3.10/site-packages/hyperkitty/views/thread.py", line 238, in thread_index 233833 return render(request, "hyperkitty/thread.html", context=context) 233834 File "/opt/mailman/venv/lib/python3.10/site-packages/django/shortcuts.py", line 25, in render 233835 content = loader.render_to_string(template_name, context, request, using=using) 233836 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/loader.py", line 62, in render_to_string 233837 return template.render(context, request) 233838 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/backends/django.py", line 107, in render 233839 return self.template.render(context) 233840 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 172, in render 233841 return self._render(context) 233842 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 164, in _render 233843 return self.nodelist.render(context) 233844 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 1018, in render 233845 return SafeString("".join([node.render_annotated(context) for node in self])) 233846 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 1018, in <listcomp> 233847 return SafeString("".join([node.render_annotated(context) for node in self])) 233848 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 979, in render_annotated 233849 return self.render(context) 233850 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/loader_tags.py", line 159, in render 233851 return compiled_parent._render(context) 233852 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 164, in _render 233853 return self.nodelist.render(context) 233854 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 1018, in render 233855 return SafeString("".join([node.render_annotated(context) for node in self])) 233856 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 1018, in <listcomp> 233857 return SafeString("".join([node.render_annotated(context) for node in self])) 233858 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 979, in render_annotated 233859 return self.render(context) 233860 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/loader_tags.py", line 65, in render 233861 result = block.nodelist.render(context) 233862 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 1018, in render 233863 return SafeString("".join([node.render_annotated(context) for node in self])) 233864 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 1018, in <listcomp> 233865 return SafeString("".join([node.render_annotated(context) for node in self])) 233866 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 979, in render_annotated 233867 return self.render(context) 233868 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/loader_tags.py", line 210, in render 233869 return template.render(context) 233870 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 174, in render 233871 return self._render(context) 233872 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 164, in _render 233873 return self.nodelist.render(context) 233874 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 1018, in render 233875 return SafeString("".join([node.render_annotated(context) for node in self])) 233876 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 1018, in <listcomp> 233877 return SafeString("".join([node.render_annotated(context) for node in self])) 233878 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 979, in render_annotated 233879 return self.render(context) 233880 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 1077, in render 233881 output = self.filter_expression.resolve(context) 233882 File "/opt/mailman/venv/lib/python3.10/site-packages/django/template/base.py", line 750, in resolve 233883 new_obj = func(obj, *arg_vals) 233884 File "/opt/mailman/venv/lib/python3.10/site-packages/hyperkitty/templatetags/decorate.py", line 42, in render 233885 return mark_safe(text_renderer(content)) 233886 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/markdown.py", line 120, in __call__ 233887 return self.parse(s)[0] 233888 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/markdown.py", line 93, in parse 233889 self.block.parse(state) 233890 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/block_parser.py", line 458, in parse 233891 end_pos2 = self.parse_method(m, state) 233892 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/core.py", line 216, in parse_method 233893 return func(m, state) 233894 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/block_parser.py", line 369, in parse_block_quote 233895 text, end_pos = self.extract_block_quote(m, state) 233896 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/block_parser.py", line 346, in extract_block_quote 233897 end_pos = self.parse_method(m4, state) 233898 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/core.py", line 216, in parse_method 233899 return func(m, state) 233900 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/block_parser.py", line 388, in parse_list 233901 return parse_list(self, m, state) 233902 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/list_parser.py", line 64, in parse_list 233903 groups = _parse_list_item(block, bullet, groups, token, state, rules) 233904 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/list_parser.py", line 178, in _parse_list_item 233905 block.parse(child, rules) 233906 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/block_parser.py", line 458, in parse 233907 end_pos2 = self.parse_method(m, state) 233908 File "/opt/mailman/venv/lib/python3.10/site-packages/mistune/core.py", line 214, in parse_method 233909 assert lastgroup 233910 AssertionError This is the last error in mailmanweb.log, the errors before that are similar.

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