By now most Fedora email lists have been migrated to Mailman3. One little (but killer) new feature that I recently discovered was that Mailman3 includes the RFC 5064 Archived-At header in the emails. This is a feature I have wanted for a really long time; to be able to find an email in your Inbox and copy and paste a link to anyone without having to find the message in the online archive is going to save a lot of time and decrease some latency when chatting on IRC or some other form of real t...