Mailman 3 is a complete rewrite of the software, so there are many changes all over.

Web interface: https://mailman.strw.leidenuniv.nl

Mailman3 has accounts (and passwords) per user, in stead of list passwords to be shared between owners. The first time you visit the website, create an account using the e-mail address you use to subscribe to lists, and once logged in with that account, you will see all the lists you are a member of, and if you are a list owner or moderator, you will have access to the appropriate functionality as well.

• Mailinglists are now working again, but addresses have changed. In order to avoid breaking normal mail, all mailinglists are now on the mailman.strw.leidenuniv.nl domain, so if your list was strwtest@strw.leidenuniv.nl it is now strwtest@mailman.strw.leidenuniv.nl .
• Web interface for members and list owners is at https://mailman.strw.leidenuniv.nl
• users can still subscribe normally through e-mail, but they can also make an account on the site which will then be for all the lists they subscribe to on our server, to easily manage their settings.
• actually, subscribing terough the web interface has been broken for some time, and has been fixed now in the new version.
• for logged in users it is also possible to reply to a message in the archives
• due to the improved login and subscription system, spam to the lists will be reduced quite a bit, we hope

• Links to lists and archives are not preserved from the previous version. Archives are imported, but the structure is different, so update your links. If you have external links to a list information page or to the list archives, these have to be updated.
• Access to private archives of a list is now based on a users subscription, and requires an account on the site associated with that subscription. This makes it somewhat difficult to determine what to do with old archives from before the upgrade.
  • To err on the safe side, all archives are imported, and all of them are now private, for list members only.
  • if there are list archives that really need to be made public, we may be able to find a method. But please consider first if that is actually what is needed, and permitted (privacy, confidentiality). If an archive was public out of convenience (not requiring users to log in), then we may have to sacrifice a bit of convenience to gain privacy, confidentiality and security.
• Note: lists that had not been used for more than 5 years have been discarded. If there is a real need for such a list (eg the archives were still important even though no new mails were ever sent to the list), please let us know.