Related Clues:

• Posts
• Forwards
• Drops in the letter box
• Sends, in a way
• Submits
• Puts into the postbox
• Posts a letter
• Sends
• Sends by post
• Sends out
• Uses the USPS
• Puts in the post
• Sends via the USPS
• Where holiday delays are common, with "the"
• Sends with a stamp