How to Configure WordPress to Use SMTP For Sending Emails – SiteGround Hosting

From the article:

After you install WP Mail SMTP, navigate to WP Mail SMTP -> Settings in your WordPress wp-admin panel. Select Other SMTP for the Mailer setting and a new section will open below it. Inside that new section fill in the following information:

• SMTP Host – You can find the server hostname for your SiteGround website in Site Tools -> Email -> Accounts -> kebab menu -> Mail Configuration -> Manual Settings tab -> Outgoing server;
• Encryption – TLS;
• SMTP Port – 587;
• Authentication – On;
• SMTP Username – the email address you want to send emails from – for example, email@yourdomainname.com;
• Password – the password for the email address you have set in the SMTP Username field;

Then click the Save Settings button to apply the changes.

Always test the functionality of the mail-sending service after making changes to its settings. To do that go to your WordPress admin panel -> WP Mail SMTP -> Tools -> Email Test and send a test message to your email address. If you are not receiving the test message, then you need to verify the configuration settings you applied and ensure they are correct.