Related Clues:
- Yahoo offering
- Letters that can't be found at the post office
- It's sent with a click
- Quick correspondence
- Message by modem
- Potential virus carrier
- Online letter
- Forgoes the USPS
- Letters that lack stamps
- Cyberspace epistle
- USPS alternative
- It may arrive with attachments
- Cybernote
- It could have a virus
- Net receipts?