Hi Rob -
We are on version 6.1.
We send out email notifications for activities within the group. But what we are seeing is that the email queue is extremely high and the processing is very low, so we don't ever get caught up and certainly never get ahead.
We have a custom template that we are looking at, but I feel like we may have something else configured incorrectly or doing something else that would add additional slow down.
We don't have any server constraints and the database processing is looking good.