Mailing List Functionality

[quilime]

Interacting with Discourse as mailing list

• https://meta.discourse.org/t/discourse-vs-email-mailing-lists/54298/4
• https://meta.discourse.org/t/replacing-mailing-lists-email-in/13099
• https://meta.discourse.org/t/start-a-new-topic-via-email/62977
• https://github.com/discourse/mail-receiver
• https://meta.discourse.org/t/configuring-reply-via-email/42026
• https://meta.discourse.org/t/straightforward-direct-delivery-incoming-mail/49487
• https://meta.discourse.org/t/filtering-known-bad-sender-domains-from-your-mail-receiver/118760

[quilime]

Re-opened as separate issue. Dependent on [#2]