If I'm not the number in the white list, will he receive it if I send him a text message?

As long as you are not blacklisted by the other party, all the messages you send can be received by the other party.

If your mobile phone number sends spam to others many times and is reported by others, there may be some systems that come with your mobile phone to intercept your short messages, which is also the case.

I hope it works for you.