Boomerang for Gmail will be undergoing server maintenance on Saturday, 6/2 from 10:00 AM PDT until 12:00 PM PDT.
We expect periods of downtime throughout the maintenance window, during which you will not be able to schedule messages. All previously-scheduled messages will be delivered at the end of the maintenance period.
We try to keep these maintenance periods as infrequent as possible, but due to the growth of the service, we can’t put this one off any longer. Thanks very much for your support, and we’ll keep you updated via the @baydin Twitter account as the maintenance proceeds.
UPDATED: Saturday is 6/2, not 6/1. Sorry about the confusion.