As nouns the difference between postbox and maildrop
is that postbox is while maildrop is a place where postal mail is received and then forwarded to another address, used for anonymity or as a fixed address for somebody who is travelling.
maildrop
English
Noun
(
en noun)
A place where postal mail is received and then forwarded to another address, used for anonymity or as a fixed address for somebody who is travelling.