The process of securing a wall mount mailbox outside your house remains the same regardless of what your house is made. The only thing that changes are the tools that are used to secure the mailbox. Most houses are made of plywood with carpet or some sort of brick or block. If you have a wooden house with siding, you can use the standard tools found around the house. If your house is brick or block, specialized tools required to do the job properly. Place the box on the wall and put a spirit level on top of it. Place the niello mailbox and mark the mounting holes in the wall with a marker. As advice, consult your local post office or building inspector to see if your area has regulations about where you can place and height suitable soil.
Drill holes in the wall mount mailbox where you placed each brand. If your house is coated plywood, using a standard drill and drill bit. Make sure the bit is large enough for the wall anchor. Using a wall anchor designed for wood. Also, make sure to be careful when drilling through the coating. The vinyl coating is generally and will break if not directly go through the wall at an angle of 90 degrees.