Related Clues:
- FYI kin
- Mail-routing letters
- F on a DVD player, perhaps
- Letter-routing notation
- Letter-routing abbr
- Envelope's routing abbr
- 'This is for,' on an env
- Interoffice email abbr
- Opposite of rev
- Abbr. to begin a business letter
- Pass along, as an email: Abbr
- Package abbr
- Directional abbr
- ''This is for,'' on an envelope
- Abbr. on a cover sheet