Hello,

I have been troubleshooting an issue with our Mailman 3 archives. I have made a key observation that has helped narrow down the problem. While a newly created list appears in the HyperKitty archives, no email data is shown inside that list.

*Problem:* When I create a new mailing list in Mailman Core and then visit the HyperKitty archives, the list is correctly displayed. However, when I send an email to that list, no mail data (messages) are shown inside it. The message count for the list remains at zero in the archives UI.

*Expected Behavior:* I expect that when a new list is created, it should appear in the archives, and any emails sent to it should also be correctly displayed within that list.

*System Environment:*

*Mailman Version:* Mailman 3.x

*Archiver:* HyperKitty

*Web Interface:* Postorius

*Database:* PostgreSQL

*Setup:* Mailman Core (/opt/mailman/venv) and the web components (venv_hk) are running in separate virtual environments on the same server.

*Troubleshooting Steps Taken:*

*List Synchronization:* Creating a new list in Mailman Core immediately makes it visible in the HyperKitty archives, which confirms that the mailmanweb service is correctly communicating with the hyperkitty_mailinglist table. 2.

*Email Injection Test:* I used the mailman shell to inject a test email directly into a list. The inject_message function executed without errors. 3.

*Configuration Check:* I have verified that the base_url in the Mailman archiver configuration (mailman-hyperkitty.cfg) and the MAILMAN_ARCHIVER_KEY in the HyperKitty settings file (settings.py) are correctly set and match.

Could this be due to an API key or permissions issue preventing the data from being written, even though the tables exist? Any advice on what to check next would be extremely helpful.

Thanks