WP Mail SMTP Pro v3.4.0
WP Mail SMTP Pro v3.4.0 is The Most Popular WordPress SMTP and PHP Mailer Plugin. If you're having issues with WordPress not sending emails, you're not alone. With the rise of aggressive spam filtering, it's tough to reach the inbox unless your emails are configured correctly. Once you've switched from the default WordPress email settings over to WP Mail SMTP, your email deliverability issues will be solved for good.