Related Clues:
- For, for short
- Package directive: Abbr
- Office mail abbr
- Abbr. for routing of mail
- Something in addition to the letter: Abbr
- Something extra in an env
- Envelope routing abbr
- Memo inits
- Abbr. before a recipient's name
- Envelope-directing abbr
- Mail abbreviation
- Abbreviation on a memo
- Subj. line heading
- Abbr. before an addressee
- Memo header abbr