Related Clues:

• Deliver spam
• Stack of papers
• Send, on a computer
• Cyber-missive
• It might have an attachment
• Inbox contents
• Hit "Send"
• Inbox buildup
• It's often filtered
• Modern means of relaying jokes
• Spam, sometimes
• Alternative to the post office
• Unstamped letters
• Some have worms
• Send with a click