Currently the various email-in addresses we have are a bit of a mess, mostly down to it being quite difficult to create new ones. That is soon going to be fixed: here and here.
So it’s time to propose a standard for email-in addresses.
I propose, simply: <slug>.<subslug>@discourse.mozilla.community
So, the address for this category would be: meta@discourse.mozilla.community
And the #mozillians:nda category would be: mozillians.nda@discourse.mozilla.community
If there are no objections, we’ll be implementing this in a couple of weeks time.