Related Clues:

• Already gone
• Snail-mailed, say
• Email notification
• *Nostalgic sort
• Folder of emails you wrote
• Transmitted a text message
• Mailed, e.g
• Received's u-turn
• Airmailed
• Get rise out of sentries posted
• Paid to mail
• Package tracking status
• Status of an email that has left the outbox
• Confirmation on Gmail
• Gmail folder heading