When I was on our EC we did most of our correspondence via email between committee members. If we did not we would have not achieved anything. Most of the committee members worked full time. At least with an email, they can perhaps answer whilst at work if not at home. Only with the really big decisions did we have a meeting if only so that we could get everyones input/ideas/suggestions on the matter. Sometimes what seems like a good idea/decision may not be when someone points out the negatives in it and you can't have those discussions via email.
However the EC did not correspondence directly with residents via email. We encouraged residents to send emails to the SM to be forwarded or copy sent to EC. And the EC did the same, sent emails to residents via SM. In that way, there was a recorded copy on file of any discussions/problem/issues. It worked well. If we had to have a meeting for every decision in the place, it would have taken months for each and every matter.