SMTP.com

<p><a href="https://smtp.com" rel="nofollow ugc">SMTP.com</a> was the first company to provide email delivery at scale for customers unsatisfied with traditional sending methods. With over 22 years of email delivery success, SMTP.com is the trusted transactional and email relay provider for over 100,000 businesses worldwide. This WordPress integration for SMTP.com enables you to send and track your emails seamlessly.</p>
<p>Don’t worry about maintaining your email server or taking care of its IP reputation, forget about dealing with ISPs like Gmail, Yahoo or Microsoft in attempting to understand why your email isn’t reaching its destination. SMTP.com manages all this on your behalf. Simply create a SMTP.com account to <a href="https://registration.smtp.com/?afid=wpplugin" rel="nofollow ugc">get started</a> and set up this plugin. Although this plugin is free you will need a paid subscription with SMTP.com to send emails from your WordPress site.</p>
<p>You can send emails from your WordPress site using the SMTP.com API or the standard SMTP protocol. Our plugin will suggest the best way for you to send email even if your provider has restricted access to outbound internet ports. Either way, SMTP.com will still ensure your email gets delivered.</p>
<p>Another useful feature provided with our WordPress plugin is the ability to track your email delivery from within the plugin itself. See the results of your recent sends to ensure successful delivery or identify the reason why your particular email hasn’t been delivered.</p>



Didn't work with the API key, but managed with the login information.


Good

SMTP.com is a powerful and reliable SMTP delivery service that enables you to send and track high volume emails effortlessly.

socialveo

<p>Socialveo SMTP allows you to configure and send all outgoing emails via a SMTP server.</p>
<p>You can set the following options:</p>
<ul>
<li>Set the from name and email address for outgoing email</li>
<li>Set the reply to email address</li>
<li>Set an SMTP host</li>
<li>Set an SMTP port</li>
<li>Set SSL / TLS encryption</li>
<li>Set to use SMTP authentication</li>
<li>Set an SMTP username and password</li>
</ul>
<p>Works with any email sending service that offers SMTP.</p>
<h4>Why use SMTP?</h4>
<p>This plugin will prevent your emails from going into the junk/spam folder of the recipients.<br />
Email sent by WordPress use PHP mail() function, and often the email go in the spam folder or get completely rejected by popular email providers.<br />
SMTP (Simple Mail Transfer Protocol) is the industry standard for sending emails.<br />
This plugin helps you use proper authentication which increases email deliverability.</p>
<h4>Why use this SMTP plugin?</h4>
<p>There are many WP plugins for SMTP, but this one aim to be simple by using lightweight code (single file less than 4KB), without storing anything on database, but doing configuration only via wp-config.php. Also there is not complete override of wp_mail() function like other plugins, but it’s used only hook for add additional functionality; this allow easy upgrade to future version of WP.</p>
<h4>Credits</h4>
<p>It is maintained by the team behind <a href="https://socialveo.com/" rel="friend nofollow ugc">Socialveo</a>.</p>
<h4>What’s Next</h4>
<p>Add HTML email templates to all wordpress emails.</p>


Socialveo SMTP

Socialveo SMTP allows you to configure and send all outgoing emails via a SMTP server.

SMTP.com vs Socialveo SMTP