(These people should also have access to the Sharepoint group hosted with the HfK. Remember that memberships in the mailing list and the Sharepoint group are now separated and need to be managed individually.)
For a lack of a better solution (or a different domain provider, which is scheduled to change in Jan 2020) the mailing lists are hosted for free with mailman at the University of Bremen.
Since Jelko did not like to have addresses ending with @mailman.zfn.uni-bremen.de he cheated his way around build forwards form @radioangrezi.de to the mailman server. (Due to restrictions with one.com we could not realize list addresses with @lists.radioangrezi.de which would make future changes much easier.)
DNS MX record for radioangrezi.de: one.com mailserver
Schema: [email protected] → firstname.lastname@example.org
x and x' need to match! Because:
At each mailman list radioangrezi.de is set as host_name. This way the list actually seems to be running on radioangrezi.de, and not at the University. It's a hack. Actually it would be nice to have a mailman (or similar) that actually allows CNAMEing at lists.radioangrezi.de for example.
Conclusion: If you add lists. You need to add forwards!
-owner and -bounce -request -join -leave are not forwarded so far! That might cause a ton of problems. Let's see! ;)
In the beginning we created a few more lists. So currently (2019-03-25) we got (freshly signed up, not configured):