I have a rural mailbox,, large enough where I put inside 4 dividers, labeled tenants and each has a slot.. 

Above were answers to your questions, here is my advice, use a server and have him served, you will thank me for this.

I have a friend that has a 4 unit of 1/1 that's has been on the market for a couple weeks in the high 300's. Lots

You can have any Process Server handle the serving and they will perform "legal service" so you may proceed regardless. 

I have several investment properties (total loans of 4) and need to fill up my remaining 6 slots of additional investment properties.

Show good performance on your existing properties, and be a credible buyer and you won't have a problem.I have never used my conventional slots, though, until recently.

Of course you cant spam up their servers when you get back in.Unless you can post on another IP easily.

So I guess its an server problem no conspirancy, not today ;).

And if you aren't happy with the BP search, you can always use google and add this to your query: site: biggerpockets.com But take the space out after the colon; I had to insert that so that the text did not get mangled by the BP servers.

The rest goes to court costs, the process server, and the sheriff.