What is the HyperSend follow up letter email?
The ‘HyperSend Follow up letter’ is the second notification mailed to the recipient(s) who have not yet picked up a delivery. It is part of the HyperSend delivery expiration feature. This notification is emailed to the recipient of a delivery after 14 days from the original send date. Deliveries expire after 21 days. There are 2 email reminders sent to the sender and recipient(s).