This will cause the inconvenience of someone from your firm having to go get the mail at the post office until you swap your unapproved horizontal mailboxes with an item that fits within the 4B or 4C standard postal regulations for commercial horizontal mailboxes.
Please don't make the error of believing you can create your own set of horizontal mailboxes for your commercial building that allows you to save on the cost of purchasing something that meets the approval of the postal service in your area.
While there won't be any specific regulations that forward commercial or residential customers from constructing their own mail receptacles, you must be sure to contact the post master and get approval before you are able to use them to collect your mail.
In actual fact, you should contact the postmaster before beginning to prevent the opportunity of wasting money on something that doesn't meet postal regulations. For instance, the 4C regulations that went into effect in January 2010 required larger compartments than previous standards-almost double the previous size in fact.
Commercial horizontal mailboxes you can utilize both indoors or outdoors in businesses must meet requirements, so remember to follow them. While we ordinarily think of these types of mailboxes as something you will see in the lobby or large multi-company office buildings, this is not always the case.
You'll also find them in one central location that houses companies within an industrial park and at times on the grounds of a multi-family residential facility. It is for these reasons that the post office has edited the standards for commercial horizontal mailboxes and included standards for a boost in the size and quality of the security features.
