Direct Mail Campaign HELP

[Uniqueka Anderson]

I live in Jacksonville,Fl and am currently starting my REI career. I know that marketing and networking is essential. I've decided to start my direct mail campaign. Wholesaling is my niche, so I would like to find inheritance owners. I've searched public MLS, Craigslist, Zillow, realtor etc. How do I find these homeowners that are not listed online? Is there any public records that I could access to find them? I'm brand new to investing and I could really use the feedback. - Unique'ka