Gmail, Hotmail, and Yahoo Mail problems are solved with Postman, a next-generation OAuth 2.0-capable SMTP mailer for WordPress.
Easily send emails from your WordPress blog using your preferred SMTP server
WP Mail Bank reconfigures the PHPMailer and make it more enhanced with advanced smtp settings options.
WP Simple Mail Sender is a very simple plugin to change the sender address and name in outgoing emails.
Easy SMTP Plugin help you to send Emails from your WordPress Blog using your preferred SMTP Server.
Integrate wordpress to the mandrill , sendgrid , getresponse, cleanmailserver SMTP Server, Amazon SES or any SMTP Server.
Version: 3.1 Configure SMTP mailing in WordPress, including support for sending e-mail via SSL/TLS (such as GMail).