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.

socketlabs

SocketLabs is a cloud-based email delivery platform built to help you send your marketing and transactional email from one platform. SocketLabs provides optimized email delivery at scale, real-time tracking and analytics, reliable Email APIs for developers, and a suite of Email Marketing Tools that will make sending your next email campaign a breeze.
The SocketLabs WordPress Plugin allows you to easily route email generated by WordPress through SocketLabs rather than the default wp_mail() function that WordPress provides.
Use the SocketLabs plugin if:
<ol>
<li>Your mail from WordPress is failing to be delivered and you need an easy way to get your email to the inbox.</li>
<li>You’re looking for better Inbox placement over an optimized email network.</li>
<li>You would like to get more insight into the performance of your email from our detailed reports in the SocketLabs Control Panel.</li>
<li>Your WordPress instance has been blacklisted and you need to get your mail flowing again.</li>
<li>Your WordPress site is exceeding the number of emails allowed by your ISP.</li>
</ol>
By using the SocketLabs plugin, you can finally take advantage of improved deliverability from WordPress, while benefiting from our powerful delivery platform that’s built to get your emails to the inbox. And in your SocketLabs Control Panel, you’ll be able to take advantage of our expanded feature set, including in-depth tracking and analytics, a Drag and Drop Email Designer, list management, and so much more!
For more details, please visit our official documentation here: 
https://www.socketlabs.com/blog/configure-wordpress-plugin/
<h3>How do I create a SocketLabs account?</h3>
You can sign up for a free account here https://socketlabs.com/signup_form/?plan=Free.
<h3>Help & Support</h3>
Visit our Support System if you have any questions, the SocketLabs Support Team is happy to help — https://support.socketlabs.com/

SocketLabs

The SocketLabs WordPress Plugin allows you to easily send email generated by WordPress through the SocketLabs Email Delivery Service.

Best WP SMTP Email vs SocketLabs