It is recommended that you use WP mail SMTP
This is the free third-party SMTP that I currently use, which completely enables the
https://app.sendgrid.com/
I tried other SMTP services
Sendgrid is the easiest way to set up
Teaching:https://wpmailsmtp.com/docs/how-to-set-up-the-sendgrid-mailer-in-wp-mail-smtp/