For centuries, wedding invitations served as a formal prelude to one of life’s most important rituals. Heavy cardstock, foil stamping, handwritten calligraphy—these were not just aesthetic choices, ...

You probably have a friend who managed to get his or her thank you notes out a week after the wedding, while on vacation in Aruba. Maybe the secret isn’t a type-A personality but the help of a robot.

Usually a trip to the mailbox results in a handful of bills, a reminder from your dentist that you’re due for a cleaning, and if you’re lucky a magazine. So, it’s an exciting moment when an envelope ...