Related Clues:

• Separate by type
• Do a mailroom job
• Work with mail
• Organize
• Put into piles
• Genre
• Methodically organize, as clothes
• Put into slots
• Ilk
• Arrange
• Do a postal job
• Do post office work
• Separate into whites and darks, e.g.
• Alphabetize
• Organize, in a way