Make mailing lists require TLS 1.2 both to send and receive email

Project:Web
Component:Lists
Category:bug report
Priority:blocking
Assigned:Unassigned
Status:active
Description

Currently, it's impossible for users of privacy-focused email providers to both send or receive messages from the mailing lists.

Emulatorman or any other channel owner of irc://chat.freenode.net/#hyperbola has more information on the issue.