By default, WordPress uses PHP Mail to send emails — but PHP Mail lacks authentication and often ends up in spam folders. Using SMTP ensures your emails are authenticated and reliably delivered.
Multidata SMTP Settings
If your emails are hosted with Multidata:- Hostname: smtp.stackmail.com
- Port: 465 (SSL) or 587 (TLS)
- Security: SSL/TLS
- Username: Your full email address
- Password: Your mailbox password
Using a plugin (recommended)
WP Mail SMTP is a free plugin that guides you through the setup with a wizard. Install it from Plugins > Add New and search for “WP Mail SMTP”. Easy WP SMTP is another popular option available from the WordPress plugin repository.Without a plugin
You can configure SMTP directly by adding constants to your wp-config.php file and adding an action hook to your child theme’s functions.php. See the full code example in the original Multidata documentation.Source: https://docs.Multidata.com/email-hosting/wordpress-smtp-plugin