Can your Receva mailbox be opened without a smartphone? Kristen Mahler December 21, 2017 02:05 Updated Follow Yes, it can. The mailbox can be opened with a physical key or a fob can be purchased for you to use to gain access also. Related articles Will you be creating additional mailbox sizes? How does Receva connect to the Internet? Is a Receva mailbox secure? Comments 0 comments Please sign in to leave a comment.