Josh Mckibbin

<p>The <a href="https://kibb.in/ssmtp" rel="nofollow ugc">Simple SMTP Mailer</a> plugin allows you to easily configure WordPress to use SMTP instead of the PHP mail function.</p>
<p><strong>This should only really be used in a development environment.</strong></p>
<h3>Simple SMTP Mailer Settings</h3>
<ul>
<li><strong>Host</strong>: The mail server (Defaults to smtp.gmail.com)</li>
<li><strong>Username</strong>: The username used for connecting to the SMTP server</li>
<li><strong>Password</strong>: The password used for connecting to the SMTP server</li>
<li><strong>Port</strong>: The port to use when sending an email (587, 465 or 25. Defaults to 587)</li>
<li><strong>Security</strong>: The type of encryption security to use when sending an email (TLS or SSL. Defaults to TLS)</li>
<li><strong>Debug</strong>: Enable debugging</li>
</ul>
<p>All settings can be overridden by assigning array values to the SSMTP_MAILER constant in wp-config.php. This is useful for automating local deployment.</p>
<pre><code>define(
    'SSMTP_MAILER',
    array(
        'host' => emailhost.com,
        'username' => username,
        'password' => password,
        'port' => 25,
        'security' => 'SSL'
    )
);
</code></pre>


Simple SMTP Mailer

Simplifies local development by configuring WordPress to use SMTP instead of the PHP mail() function

MailerSend

<p>WordPress hosting companies are not optimized for high-volume email sending, which may result in some of your emails not getting delivered. MailerSend’s <a href="https://www.mailersend.com/features/smtp-relay" rel="nofollow ugc">dedicated SMTP server</a> will ensure that your forms, account notifications, e-commerce orders, and other transactional emails get delivered. By using this official SMTP plugin, you will:<br />
* Improve your email deliverability<br />
* Protect your domain reputation<br />
* Learn more about your recipients</p>
<h4>Deliverability</h4>
<p>Improve inbox performance and ensure a smooth customer experience by letting MailerSend take care of email sending. After a decade of email delivery experience, MailerSend’s deliverability experts understand what it takes to avoid spam filters, stay off blocklists and lower bounce rates.</p>
<h4>Domain reputation</h4>
<p>Keep your domain reputation safe with MailerSend’s email authentication practices. Give your customers the confidence that they’re interacting with an established brand, and let MailerSend manage the emails that could potentially damage your reputation.</p>
<h4>Analytics</h4>
<p>Understand what happens after an email gets sent. Access a wide range of key metrics—like open rates, bounce rates and click-through rates—to learn what works and what needs optimization so you can keep improving your email performance.</p>
<h4>Features</h4>
<ul>
<li>Avoid spam filters, prevent blocklisting, and lower hard bounce rates with powerful sending infrastructure</li>
<li>Automate the customer experience by connecting to thousands of other apps with Zapier</li>
<li>Get instant push updates with webhooks</li>
<li>Receive customer replies sent to your domain with an inbound route feature</li>
<li>Monitor all email interactions such as opens, clicks, open locations and devices. Plus, use your own subdomain and get a custom tracking link!</li>
</ul>
<h4>How it works</h4>
<ol>
<li>Install and activate the MailerSend plugin.</li>
<li>Add your <a href="https://app.mailersend.com/domains" rel="nofollow ugc">SMTP credentials</a> from MailerSend to establish the connection.</li>
<li>Test your connection to make sure it’s working.</li>
<li>And get sending!</li>
</ol>
<h4>Support</h4>
<p>Get help whenever you need it. <a href="https://www.mailersend.com/contact-us" rel="nofollow ugc">Contact us</a> or drop a message via live chat in the app. MailerSend’s dedicated support team works 24/7 because transactional emails never stop.</p>


MailerSend – Official SMTP Integration

<p>I'm using MailerSend as transactional email provider because they offer some great features that other providers don't have.<br />Beside this they have a great deliverability, sending speed and the MailerSend interface is really nice.</p>
<p>The plugin does a good job, but it's much to basic in my opinion.<br />I'm missing features like:<br />- Import / export settings<br />- Custom email headers<br />- a simple log file (now I need to check every issue via the MailerSend portal)</p>
<p>And why sending emails via SMTP and not via the MailerSend API?</p>

Basic features only, I need more to use the plugin for more projects

Improve your deliverability and avoid the spam box with MailerSend’s SMTP server. Check your analytics to improve your emails for better conversion!

Simple SMTP Mailer vs MailerSend – Official SMTP Integration