How do I know that my Send Later has been delivered?
Pending Send Laters are stored in Drafts and will appear on the manage page. Once a Send Later has been delivered, you'll be able to find it and the time it was delivered in the Sent folder:
Pending Send Laters are stored in Drafts and will appear on the manage page. Once a Send Later has been delivered, you'll be able to find it and the time it was delivered in the Sent folder: