Related Clues:

• Keyshia Cole "Heaven ___"
• Summoned, with 'for'
• On its way, in a way
• Word of confirmation on a messaging app
• Already e-mailed
• Email tab
• Directed toward
• Placed in a mailbox
• Posted from Leverkusen today
• Outbox folder
• Already gone
• Snail-mailed, say
• Email notification
• *Nostalgic sort
• Folder of emails you wrote