In migrating an organisation from Yahoo Groups to a Google+ Community, we're finding that one of the features that users miss the most is the ability to start a new thread from an email sent to a group address. Is there a way to do this in Google+ Communities that we've not discovered yet?
In short, yes you can; I recently followed a group on Google+, and every day after I was getting an email or two, from a group member, who was simply sharing something socially as they went about their day.
Suffice it to say, that I know have group messages turned off. You can read more about it, get details of how to do it here: