My full size Kitchen , Fillet, and Sashimi blades get wiped down with acetone, buffed off with a soft and clean cloth, and then I put on an edge guard. It is a piece of the slotted plastic that band saw blades come with on their edge. I place a rubber band on each end to make sure it stays in place. Then I roll it in heavy craft paper and fold the ends in. Tape is all that finishes the wrap ( watch the gal at Subway for the technique). A USPS flat rate box is the preferred mailing container.
On smaller knives, I wrap the knife in a piece of paper and fold in the ends. Then I slide it in a paper towel tube ( I save all of them) to make it secure. Staple the ends shut, and put in the USPS box.
On fighter style and dagger blades, I put a cork on the blade tip to prevent the blade piercing the box when ( not if) the mail handlers throw it around in delivery.
For drawer queens, providing a plastic/nylon blade sheath ( kitchen store or online) is an inexpensive and professional touch.
Photographs are another animal, and there are great tutorial threads and sites available on the subject.