Update 10:45 MT - Email Activity is back online, and all history should be caught up. Please contact us if you experience any issues. - Jacob

On Saturday, December 3rd between 08:30 and 10:00 PT, we will be taking Email Activity offline for maintenance. We are logging the events, and will be populating them once the system is back online.The data will be catching up, and may be delayed for a couple of hours after that.

There will be no impact on email deliverability. - Jacob