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 When will Receva be available in my area? How does Receva connect to the Internet? Comments 0 comments Please sign in to leave a comment.