Tomorrow (10/Jan/2018) at 9:00 EST, we will be upgrading the ClamAV Mailman list hosting server.
This will result in the clamav-users, clamav-devel, community-sigs, clamav-virusdb, etc will be down during the outage. We will send a notification via the lists, blog, Twitter, and Facebook when the server is back up.
Thanks for your patience during our maintenance!
Update: The list servers have been upgraded.