Related Clues:
- Message a mile off
- Some Internet messages
- With 56-Across, a smartphone notification
- Message from a server
- Digital communication
- The kind of communication that gives compiler back trouble
- Smartphone reading
- Some screen writing
- Communication form that's eaten into Postal Service revenues
- AOL service
- Astronaut capability since 1991
- Some iPhone reading
- Some iPhone messages
- Spam, perhaps
- Encryption candidate