You can now post discussions and questions to the tracks around the Emerson Exchange 365 community via email. For this top level "general discussion" area, the email address is [email protected].
You can find the email address for your favorite tracks on the Discussions / Questions tab. For example, in the Flow track's Discussions / Questions tab, you'll see a right-side "Email Information" widget:

The "Email this forum" link has a unique email address for the track, in this case: [email protected].
Give it a try with your favorite track and if you see any tracks we inadvertently missed, send me a note and we'll get it enabled... thanks!