Answer: pob

AnswerCrossword Clue
POBU.S.mail drop-off pt., sometimes
POBEnvelope abbr.
POBContainer for mail: Abbr.
POBAbbreviation on mail
POBMail holder: Abbr.
POBMail-address initials
POBMail convenience: Abbr.
POBPostal abbr.
POBPart of some addresses
POBNumbered compartment in a post office, briefly
POBEnvelope abbr., sometimes
POBPart of some addresses (Abbr.)
POBEnvelope abbr. preceding a number
POBAddress no.
POBNo. preceder on an envelope