We selected the Mail Boss Mail Manager Street Safe Locking Security Mailbox as the best mailbox for its large capacity and its protective bi-cam, anti-pry latch.

Available in post- and wall-mounted options, the best locking mailboxes have baffle doors to prevent fishing and magnetic closures to seal out rain.

And the mailbox industry was dominated by some large players that just didn’t have an answer for it,” says Rhys Jones, the Home Depot executive who first stocked the Oasis line in 2005 because ...