In your Profile Settings area you will find a section which allows you to edit your notification settings that come through to your email address.
You can select your frequency of notifications from Instantly, Hourly or Never
If you select Hourly, you will receive an email digest. An email digest consolidates your Huddle notifications into an hourly digest as opposed to receiving an individual notification for every event, reducing email overload.
If you chose to receive your notifications in digest form, you will only receive a digest on the hour if there is something to notify you about. It will be especially useful for reminders, as they will be consolidated into one email per day.
Regardless of your selection, you will still receive all notifications instantly on your Huddle Dashboard, though, so you won't miss anything.