physical address or mailing address for direct mail?

[Justin A.]

I have a list of both physical address and a “mailing address” for particular properties, which one would you choose for direct mail? Im assuming those properties are rental properties, so by using the mailing address I would get the message (my mail) out to the owner right? some properties have P.O. boxes address, would you mail to that too? to anyone who has any experience on this, would be helpful. much appreciated!