Contact Form 7 cant send message on Cyberpanel

I just migrated to Cyberpanel recently. I hosted my domain on Plesk previously.
My website is built on Wordpress and installs Contact Form 7. It worked fine when hosted on Plesk. Now, the CF7 can’t send the filled form to targeted email address. After I clicked the submit button, it just says “There was an error sending message. Please try again later.” I have no idea what kind of error it was.
I’ve tried installing Easy WP SMTP plugins with no success results. Email account with the domain name, however, works good. I can send and receive email through [email protected].
Can anyone help me to solve this issue, please?

Who is your provider? Have they blocked email ports?

Propably your IP is blacklisted, use SMTP plugins with SMTP providers example mailgun