mailbox

Short definition from Wiktionary

Noun

1. 1
   A box into which mail is placed: A collection point for mail intended for onward delivery, a secure box or receptacle for this purpose.
2. 2
   A box into which mail is placed: A delivery point for mail, a box, compartment or slot for this purpose.
3. 3
   A folder or account for the storage of email; an electronic inbox or mailstore.