Related Clues:

• Snail mail attachment
• The 'P' of PX
• Last name in etiquette
• Put a text message through
• E-mailer's button
• Soldier's place
• Satirize, with "up"
• Sign holder
• Drop in the mailbox, e.g.
• E-mail icon
• Mail off
• Outlook Express option
• Ship out
• Racetrack marker
• Fence stake