Today, the phpMyAdmin team has completed migrating all mailing lists to a new server. As a result, all messages posting to a list need to be addressed using the new email addresses. Existing users were migrated successfully, but digest preferences and other preferences may need to be reset.
You can visit the new mailing lists on the web at https://lists.phpmyadmin.net/.
You can subscribe through the web of using general Mailman-style addressing, for instance firstname.lastname@example.org.