How do I have my website send email through another provider instead of my server?
There are many reasons to not use your server to send email referenced here in our email FAQ guide.
This tutorial explains how to send email via another provider using the WP Mail SMTP Plugin.
To set up WP Mail SMTP to send your website through another provider, follow these instructions: https://wpmailsmtp.com/docs/how-to-install-the-wp-mail-smtp-plugin/
If you choose to use WP Mail SMTP to send your website’s server email through Google, and need technical support you can contact WP Mail SMTP here: https://wpmailsmtp.com/contact/