Summary
The discussion revolves around sending emails to a different domain to create direct messages (DMs) in specific groups within a Discourse instance. Stefan_Fairphone wants to know if it’s possible to have emails sent to @fairphone.community delivered to groups on forum.fairphone.com.
Overgrow and pfaffman suggest that this is not possible with Discourse out of the box, as it can only poll a single collecting mailbox. They recommend using email forwarders to forward emails from the external domain to the Discourse collecting mailbox. Stefan_Fairphone thanks them for their ideas and plans to discuss further with their admins.
Continuing the discussion from Start a New Topic via Email 
:
Is it possible to have e-mails to a different domain be delivered to a specific group?
E.g. the Discourse instance is hosted on forum.fairphone.com, but the e-mail addresses end in @fairphone.community.
So, send e-mail to address → Create DM in group:
foo @ fairphone.community → DM in group Foo at forum.fairphone.combar @ fairphone.community → DM in group Bar at forum.fairphone.comCorrect me if I’m wrong but I don’t think that you can do this with Discourse out of the box. It can only poll single collecting mail box.
Easier would be to use some kind of email forwarder (hosting usually supports that) from email box on external domain (foo @ fairphone.community) to the proper Discourse collecting mailbox for that category / group (reply+category1foo @ forum.fairphone.com). That is definitely doable.
Yes. Just see that all of those messages get to Discourse and configure the groups accordingly.
That’s true, so you’d need to forward [foo|bar]*fairphone.community to whatever mailbox discourse is getting.
Ok, thanks for your ideas! I’ll forward this to our admins and come back if we bump into issues. 