If a website has already linked to your website, they already know you and you can use this to your advantage.
For those who have linked to your website, you could say something like this:
Hello (generous backlinker),
I noticed that you mentioned my post (title) in your recent post about (topic). I wanted to thank you for the mention; I really appreciate your trust in me!
Also, I wanted to let you know that I recently wrote a related post about (related topic). gambling database If you think it's something your audience might be interested in, feel free to reference it on your website!
This also works with social media sharers. Try searching for your website on social media search engines like Twitter, Facebook, LinkedIn, etc.
This will show you who has posted links to your website on social media.