WP Mail SMTP is the easiest and most popular WordPress SMTP plugin. We build software that helps your site reliably deliver emails every time.
Email deliverability has been a well-documented problem for all WordPress websites. However as WPForms grew, they became more aware of this painful issue that affects our users and the larger WordPress community. So they decided to solve this problem and make a solution that’s beginner-friendly.
Their goal is to make reliable email deliverability easy for WordPress.
wp_mail() function to use Gmail/Mailgun/SendGrid/SMTP instead of the default
mail() and creates an options page to manage the settings.