In the past, we made all our Autoresponders go out at the exact same time (roughly 8pm ET).
Knowing exactly when that process was supposed to kick in like this was good for us back when the feature was new and we weren’t sure about its impact. But as more and more people started to use it, 8pm started to become a little bit of a bottleneck. Suddenly queuing up over 20,000 autoresponder campaigns at once is just not healthy.
So a couple days ago, we changed the process to be more "spread out" over 8 – 12 hrs. As a result, you might start to see your autoresponders arriving in inboxes later or earlier than you usually do. Yep, it’s supposed to do that.