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.

CodingBunny

<p>CodingBunny Mail SMTP allows you to easily configure an SMTP server to send all outgoing emails from your WordPress website.</p>
<p>By default, WordPress uses the <code>wp_mail()</code> function which relies on the server’s PHP mail configuration. This often leads to delivery issues or emails ending up in spam. This plugin solves that problem by routing emails through a reliable SMTP server.</p>
<h3>Key Features</h3>
<ul>
<li>Enable or disable SMTP with a single toggle</li>
<li>Supports SSL, TLS, or no encryption</li>
<li>Optional SMTP authentication (username & password)</li>
<li>Secure password storage using encryption</li>
<li>Custom “From Email” and “From Name”</li>
<li>Built-in test email tool</li>
<li>Lightweight, no third-party dependencies</li>
<li>Fully compatible with WordPress PHPMailer</li>
<li>Clean and accessible admin interface</li>
</ul>
<h3>Security</h3>
<p>The SMTP password is encrypted before being stored in the database** and is never displayed in plain text in the WordPress admin area.</p>
<h3>Configuration</h3>
<p>You can configure the following options:</p>
<ul>
<li>SMTP Host (e.g. <code>smtp.example.com</code>)</li>
<li>SMTP Port (e.g. <code>587</code>)</li>
<li>Encryption: None, TLS, or SSL</li>
<li>Enable/Disable SMTP authentication</li>
<li>SMTP Username & Password</li>
<li>Sender Email Address</li>
<li>Sender Name</li>
</ul>
<p>After saving, use the Test Email section to verify your configuration.</p>
<h3>Uninstall</h3>
<p>When the plugin is uninstalled, all plugin options (including encrypted credentials) are removed from the database.</p>


CodingBunny Mail SMTP

Configure an SMTP server to send emails from your WordPress site. Simple, lightweight, and secure.

SMTP.com vs CodingBunny Mail SMTP