Related Clues:

• Online item
• Modern correspondence
• It doesn't leave a paper trail
• In-box input
• Spam, maybe
• It may start with 're'
• Office machine
• Terminal message?
• Stamp saver
• Steno reminder
• Dot com letters
• Temp's pad
• Office communiqué
• Bulletin-board posting, perhaps
• It might arrive with a beep