Themexa

Best WP SMTP Email plugin is the most simple, easy and best SMTP emailer plugin for WordPress.
Using SMTP in your WordPress site was never been easier. Configuration is the easiest part of Best WP SMTP Plugin. Simply copy your SMTP credentials, and paste in plugin settings panel. That\’s it, no mumbo-jumbo!
Features:
<ul>
<li>Beautiful Design</li>
<li>Easiest Configuration Panel</li>
<li>Supports WordPress Multisite</li>
<li>Works Perfectly with Latest Version of WordPress</li>
<li>Supports ALL SMTP Servers</li>
<li>Supports SSL/TLS Security Protocol</li>
<li>Supports No Authorization</li>
<li>Built-in Usage Guide</li>
<li>SMTP Test Email Option</li>
<li>Works with ALL WordPress Themes</li>
<li>Highly Secure</li>
</ul>
This plugin overrides the native wp_mail() function. So if you are having any issue with your current emails, this plugin will most probably solve that issue for you.
You will love this plugin for sure!
Please contact \”support@tinypixi.com\” if you face any kind of issue with this plugin. We will try our best to resolve.

Best WP SMTP Email

Best and the Easiest SMTP Plugin for WordPress.

FolioVision

This plugin reconfigures the wp_mail() function to use SMTP instead of mail() and creates an options page that allows you to specify various options.
You can set the following options:
<ul>
<li>Specify the from name and email address for outgoing email.</li>
<li>Choose to send mail by SMTP or PHP’s mail() function.</li>
<li>Specify an SMTP host (defaults to localhost).</li>
<li>Specify an SMTP port (defaults to 25).</li>
<li>Choose SSL / TLS encryption (not the same as STARTTLS).</li>
<li>Choose to use SMTP authentication or not (defaults to not).</li>
<li>Specify an SMTP username and password.</li>
</ul>
Also adds subject to headers for SendGrid Activity Screen. SengGrid is a powerful SMTP service, however it’s Activity Log screen misses the message subjects. Our plugin adds that back in!

WP Mail SMTP SendGrid Edition

Based on WP Mail SMTP. Also adds subject for display on SendGrid Activity Screen.

Best WP SMTP Email vs WP Mail SMTP SendGrid Edition