We’re launching MailChimp v5.3 late tonight. The changes are big, but they won’t require any reboots of the server or anything that would affect scheduled email campaigns or reports. While we’re launching, you may not be able to log in to the service. We plan to begin around 10PM ET (see this in your timezone), and the upgrade process should only take a few hours (if all goes well). The changes might take some time to propagate to all user accounts, but by 9am ET tomorrow, all accounts should be upgraded.
Here’s what’s in v5.3…
