Related Clues:
- Directed to: Abbr
- E-mail subject-line abbr
- Letter abbr
- Mailing label abbr
- Env. router
- "To whom it actually does concern" letters
- "It's for you," on an env
- Letters before an intended recipient's name
- Subj. line alert
- Routing aid: Abbr
- Routing abbr. on an envelope
- For whom the memo is intended: Abbr
- Letters before a name on a letter
- Envelope ltrs
- Abbr. on a passed-along email