mailbox

noun4

1. •
   (US) A box into which mail is placed.
2. •
   (US) A collection point for mail intended for onward delivery, a secure box or receptacle for this purpose.

   • She waved back, placed a stack of envelopes in her mailbox, and lifted the red flag. — 2018
3. •
   (US) A delivery point for mail, a box, compartment or slot for this purpose.
4. •
   A folder or account for the storage of email; an electronic inbox or mailstore.