2026-01-28 10:29:35
Anybody knows, at which time (and with which product) the "reading receipt" ("Lesebestätigung") came up for e-mail? Was it with some early Outlook/Exchange version, or in some earlier messaging system? Lotus Notes maybe?
For chat, probably Blackberry was the first to introduce status like "delivered" and "read". But I wonder, when it began for mails. #techhistory

