Related Clues:

• Contacts via cell phone, in a way
• Message from cyberspace
• Where ;-) means "Kidding!"
• Earthlink transmission
• Stampless correspondence
• Spam, often
• Get hold of, in a way
• Message from a BlackBerry, maybe
• It might be spam
• Contacts by phone, in a way
• Computer message
• Modern posting
• Backpack fillers
• Post sans postage
• College bookstore stock