Answer:

POBOX

Answer	Crossword Clue
POBOX	FedEx no-no, sometimes
POBOX	Mail svc. option
POBOX	Mail dest.

POBOX	Numbered dest.
POBOX	Mailing address part, at times
POBOX	Street address alternative (abbr.)
POBOX	Disallowed FedEx destination
POBOX	FedEx won't deliver to it
POBOX	Mail dely. compartment
POBOX	Business-addr. part, parhaps
POBOX	Part of some addresses

POBOX	Address component, sometimes
POBOX	Ltr. receptacle
POBOX	Part of many business addrs.
POBOX	Part of some business addrs.
POBOX	Address abbr.
POBOX	Abbr. on many letters
POBOX	Mailing address.
POBOX	Part of many addresses

POBOX	Part of many a bus. address
POBOX	Letter getter
POBOX	Mail receiver, in brief
POBOX	Numbered rental
POBOX	Mail delivery rental
POBOX	Mail destination, maybe
POBOX	What FedEx won't deliver to
POBOX	Env. designation

POBOX	Mail letters?
POBOX	Snail mail cubbyhole
POBOX	Address with a st. but no st.
POBOX	FedEx no-no, often
POBOX	Alternative to a street address