WP Mail SMTP Pro is the most popular plugin for WordPress SMTP and PHP Mailer. Reconfigure the wp_mail() function to use Gmail/Mailgun/SendGrid/SMTP instead of the default mail() and create a settings page to manage the settings.
If you have problems with WordPress not sending emails, you are not alone. With the proliferation of spam filtering systems, it’s hard to access your inbox unless your email is configured correctly. Once you have switched from the default WordPress email settings to WP Mail SMTP, your email deliverability issues should be resolved.
Preventing your WordPress emails from being marked as spam, WP Mail SMTP integrates with all the best secure SMTP providers. No matter how many emails you need to send, you can connect with the right provider for your business needs and budget.
Demo: https://wpmailsmtp.com/