VPS + CloudFlare + Postfix + OpenDKIM not sending mails to my zoho email

VPS + CloudFlare + Postfix + OpenDKIM not sending mails to my zoho email

Hello guys, I just configured my VPS to send emails so it doesn't go to spam folder. When I execute the script to send myself an email hosted by Zoho from my VPS, it executes fine but I receive no email.

What could be the issue?