This plugin reconfigures the wp_mail() function to send email using API (via AvangEmail) instead of SMTP and creates a Settings page that allows you to set up various options.

ZeptoMail Plugin lets you configure your ZeptoMail account on your wordpress site enabling you to send transactional emails of your site via ZeptoMail API.

Send emails through Pepipost from your WordPress installation using SMTP integration.

NO LONGER MAINTAINED. Send emails and upload contacts through SendGrid from your WordPress installation using SMTP or API integration.

Zoho ZeptoMail Plugin lets you configure your ZeptoMail account on your WordPress site enabling you to send transactional emails of your site via ZeptoMail API.

Connect SendGrid to your WordPress site to send emails using SendGrid's cloud-based email platform.

This plugin reconfigures the wp_mail() function to send email using API (via Elastic Email) instead of SMTP and creates a Settings page that allows you to set up various options.

The Primail plugin allows you to connect your WordPress site with Mandrill for improved email delivery and reliability