Kasuga

<p>SMTPify does one thing: replace WordPress’s default PHP mail with a reliable SMTP connection — no ads, no upsells, and no cluttering your admin menu.<br />
Just enter your host, port, and credentials. That’s it.</p>
<p>Features:</p>
<ul>
<li>Supports SSL/TLS, TLS (STARTTLS), and unencrypted connections.</li>
<li>Optional SMTP authentication with username and password.</li>
<li>Override the From address and display name site-wide, with an option to force your identity even when other plugins set their own From values.</li>
<li>Built-in test email tool to verify your configuration.</li>
<li>Persistent error log that records mail failures with recipient and timestamp, viewable on the settings page.</li>
</ul>
<p>What makes SMTPify different:</p>
<ul>
<li>All settings can optionally be fixed in code via constants in <code>wp-config.php</code>, making the plugin maintenance-free after deployment.</li>
<li>No external dependencies beyond PHPMailer, which is already bundled with WordPress.</li>
<li>Settings page kept out of the navigation sidebar, accessible via the Settings link on the Plugins screen.</li>
<li>No ads, no upsells.</li>
</ul>
<h3>Configuration</h3>
<h4>SMTP Server</h4>
<ul>
<li><strong>SMTP Host</strong> <em>(required)</em> — The hostname of your SMTP server (e.g. <code>smtp.gmail.com</code>, <code>smtp.sendgrid.net</code>).</li>
<li><strong>Encryption</strong> — Choose TLS (STARTTLS, recommended with port 587), SSL/TLS (port 465), or None (not recommended).</li>
<li><strong>SMTP Port</strong> — Automatically updated when you change the encryption type; override manually if your provider uses a non-standard port.</li>
<li><strong>Authentication</strong> — Enable to send your username and password to the server. Required by virtually all commercial mail providers.</li>
<li><strong>Username</strong> — Usually your full email address.</li>
<li><strong>Password</strong> — Your SMTP password or app-specific password.</li>
</ul>
<h4>Sender Identity</h4>
<ul>
<li><strong>From Email Address</strong> — The address that appears in the From header. Leave blank to use the WordPress default (<code>wordpress@yourdomain.com</code>).</li>
<li><strong>From Name</strong> — The display name shown to recipients. Leave blank to use <code>WordPress</code>.</li>
<li><strong>Force Sender Identity</strong> — When checked, SMTPify overrides the From address and name set by any other plugin or theme, ensuring all outgoing mail uses your configured identity.<br />
Note: <strong>some SMTP providers (including Gmail, Outlook, Yahoo, and iCloud) ignore the From address and replace it with the authenticated account address.</strong> This setting works as expected with dedicated mail delivery services (such as SendGrid, Mailgun, and Amazon SES) and self-hosted SMTP servers.</li>
</ul>
<h4>Override Settings via wp-config.php</h4>
<p>SMTPify supports fixing settings in code by defining constants in <code>wp-config.php</code>. When one of the following constants is defined, the corresponding setting is used instead of the value stored in the admin form:</p>
<ul>
<li><code>SMTPIFY_HOST</code></li>
<li><code>SMTPIFY_PORT</code></li>
<li><code>SMTPIFY_ENCRYPTION</code></li>
<li><code>SMTPIFY_AUTH</code></li>
<li><code>SMTPIFY_USER</code></li>
<li><code>SMTPIFY_PASS</code></li>
<li><code>SMTPIFY_FROM_EMAIL</code></li>
<li><code>SMTPIFY_FROM_NAME</code></li>
<li><code>SMTPIFY_FORCE_FROM</code></li>
</ul>
<p>These definitions must be added manually to <code>wp-config.php</code> before the line that says <code>/* That's all, stop editing! Happy publishing. */</code>.</p>
<p>Example:</p>
<pre><code>php
define( 'SMTPIFY_HOST', 'smtp.example.com' );
define( 'SMTPIFY_PORT', 587 );
define( 'SMTPIFY_ENCRYPTION', 'tls' );
define( 'SMTPIFY_AUTH', true );
define( 'SMTPIFY_USER', 'user@example.com' );
define( 'SMTPIFY_PASS', 'your-smtp-password' );
define( 'SMTPIFY_FROM_EMAIL', 'no-reply@example.com' );
define( 'SMTPIFY_FROM_NAME', 'My Site' );
define( 'SMTPIFY_FORCE_FROM', true );
</code></pre>
<p>When a setting is overridden this way, the field on the plugin settings page is shown as read-only and displays <code>Overridden by ... in wp-config.php.</code></p>
<h4>Test Email</h4>
<p>Use the <strong>Send a Test Email</strong> section at the bottom of the settings page to send a live test to any address. The result, whether a success message or a detailed error from PHPMailer, is shown immediately on the page.</p>
<h4>Mail Error Log</h4>
<p>The <strong>Mail Error Log</strong> section lists the 20 most recent mail failures, each showing the date, recipient, and error message. Use Clear Log to delete all entries.</p>
<h3>Using Gmail as Your SMTP Server</h3>
<p>Gmail requires an <strong>App Password</strong> instead of your regular Google account password. App Passwords are available when two-factor authentication (2FA) is enabled, which is now mandatory for most Google accounts.</p>
<h4>Step 1 — Create an App Password in Google</h4>
<ol>
<li>Sign in to your Google account and go to <a href="https://myaccount.google.com/apppasswords" rel="nofollow ugc">myaccount.google.com/apppasswords</a>.</li>
<li>Enter a name to identify this password (e.g. <code>WordPress</code>) and click <strong>Create</strong>.</li>
<li>Google displays a 16-character password. Copy it now, as it will not be shown again.</li>
</ol>
<p>You can create as many App Passwords as you like under a single Google account. Creating one per environment (production, staging, development) is recommended: if one is compromised, you can revoke it without affecting the others.</p>
<h4>Step 2 — Enter these values on the SMTPify settings page</h4>
<ul>
<li><strong>SMTP Host</strong>: <code>smtp.gmail.com</code></li>
<li><strong>Encryption</strong>: TLS (STARTTLS)</li>
<li><strong>SMTP Port</strong>: <code>587</code></li>
<li><strong>Authentication</strong>: checked</li>
<li><strong>Username</strong>: your full Gmail address (e.g. <code>youraddress@gmail.com</code>)</li>
<li><strong>Password</strong>: the 16-character App Password from Step 1</li>
</ul>
<h4>Step 3 — Send a test email</h4>
<p>Use the <strong>Send a Test Email</strong> section at the bottom of the settings page to confirm that mail is delivered correctly before relying on the configuration in production.</p>
<h4>Notes</h4>
<ul>
<li>Your regular Gmail password will not work; only App Passwords are accepted over SMTP.</li>
<li>An App Password grants SMTP access to anyone who knows it, regardless of which application or server uses it. Store it securely and revoke it immediately at <a href="https://myaccount.google.com/apppasswords" rel="nofollow ugc">myaccount.google.com/apppasswords</a> if you suspect it has been exposed.</li>
</ul>


SMTPify

Routes wp_mail() through your provider's SMTP server. Simple settings page, built-in test tool, nothing else.

Scott Reilly

<p>Configure SMTP mailing in WordPress, including support for sending email via SSL/TLS (such as Gmail).</p>
<p>This plugin is the official successor to the original SMTP plugin for WordPress (wpPHPMailer).</p>
<p>Use this plugin to customize the SMTP mailing system used by default by WordPress to handle <em>outgoing</em> emails. It offers you the ability to specify:</p>
<ul>
<li>SMTP host name</li>
<li>SMTP port number</li>
<li>If SMTPAuth (authentication) should be used</li>
<li>SMTP username</li>
<li>SMTP password</li>
<li>If the SMTP connection needs to occur over ssl or tls</li>
</ul>
<p>In addition, you can instead indicate that you wish to use Gmail to handle outgoing email, in which case the above settings are automatically configured to values appropriate for Gmail, though you’ll need to specify your Gmail email address (including the “@gmail.com”) and password.</p>
<p>Regardless of whether SMTP is enabled, the plugin provides you the ability to define the name and email of the ‘From:’ field for all outgoing emails.</p>
<p>A simple test button is also available that allows you to send a test email to yourself to check if sending email has been properly configured for your site.</p>
<p>Links: <a href="https://coffee2code.com/wp-plugins/configure-smtp/" rel="nofollow ugc">Plugin Homepage</a> | <a href="https://wordpress.org/plugins/configure-smtp/" rel="ugc">Plugin Directory Page</a> | <a href="https://github.com/coffee2code/configure-smtp/" rel="nofollow ugc">GitHub</a> | <a href="https://coffee2code.com" rel="nofollow ugc">Author Homepage</a></p>


Configure SMTP

does exactly what it says. Been working like a charm 

simple and sweet

Most of my users and customers ask me: why my mails are not being sent? Why some mails sent from my site do not arrives?

The problem are spam filters and things like this, so SMTP is a basic tool to operate a site or ecommerce.

I have used many plugin to do this task but none like this. This solves the problem in an easy and functional way.

Simple and functional way to configure SMTP settings in your WordPress

Configure SMTP mailing in WordPress, including support for sending email via SSL/TLS (such as Gmail).

SMTPify vs Configure SMTP