Related Clues:

• Fast-arriving letter
• Major cause of the Postal Service's dwindling revenues
• Outlook messages
• Letter that opens with a click
• Gets in touch with a smile surprisingly
• Most correspondence nowadays
• Something to shoot off
• Communication form that has dealt a blow to the stationery industry
• It might be forwarded
• Kind of client
• Madeleine has no need of messages
• Virtual letter
• PC reading
• One way to get one's message across
• Transmissions via Internet