Kyle B. Johnson

Kevin Stover

Matt Pritchett

<p><strong>Ninja Mail is being sunset and no longer functions as of April 1, 2021. We recommend migrating to our new service <a href="https://sendwp.com" rel="nofollow ugc">SendWP</a>, which sends all of your WordPress transactional email rather than just your Ninja Mail emails.</strong></p>
<h4>Installation</h4>
<p>=</p>


Ninja Mail

Ninja Mail is being sunset and no longer functions as of April 1, 2021.

SYMONOV

<p><strong>SwiftTrap</strong> is a drop-in replacement for <code>wp_mail()</code> that routes WordPress email through the <strong>Mailtrap Email Sending API</strong> instead of SMTP. It is purpose-built for Mailtrap — not a generic SMTP plugin with a Mailtrap preset — so it exposes Mailtrap-native features that SMTP cannot: bulk vs transactional stream routing, email categories, custom variables for tracking, suppression lists, and domain verification status.</p>
<h4>Why HTTP API instead of SMTP?</h4>
<ul>
<li><strong>Lower latency</strong> — one HTTPS call per message, no MAIL FROM / RCPT TO / DATA round-trips.</li>
<li><strong>Better deliverability</strong> — Mailtrap routes API messages through its dedicated transactional and bulk streams; SMTP doesn’t expose stream selection.</li>
<li><strong>Native categories</strong> — every email is automatically categorized (welcome, password-reset, notification, marketing, etc.) so you can filter and report on them in Mailtrap.</li>
<li><strong>No firewall headaches</strong> — port 587/465 blocked? API works over standard HTTPS 443.</li>
</ul>
<h4>Why SwiftTrap and not WP Mail SMTP / Post SMTP</h4>
<ul>
<li>Generic SMTP plugins use Mailtrap’s SMTP credentials and lose every Mailtrap-only feature.</li>
<li>SwiftTrap calls <code>send.api.mailtrap.io</code> for transactional mail and <code>bulk.api.mailtrap.io</code> for bulk mail — automatically, based on category or via filter.</li>
<li>No Mailtrap PHP SDK required. Plugin is <strong>~30 KB total</strong> and uses only the WordPress HTTP API (<code>wp_remote_post</code>).</li>
<li>Stats page shows your sending domain verification status and the live suppression list (bounces, complaints, unsubscribes).</li>
</ul>
<h4>Features</h4>
<ul>
<li>Drop-in replacement for <code>wp_mail()</code> — works with WooCommerce, Contact Form 7, Gravity Forms, and any plugin that uses WordPress mail.</li>
<li>Automatic email categorization and stream routing overrides via settings grid.</li>
<li>Delivery Tracking & Webhooks — Real-time event tracking via custom REST route <code>swifttrap/v1/webhook</code>.</li>
<li>Suppression Management — CRUD panel for Mailtrap suppression lists with pre-send recipient suppression checks.</li>
<li>Reliability Fallback — Graceful failover back to WordPress native <code>wp_mail()</code> if the Mailtrap API call fails.</li>
<li>Site Health integration — Verification test checking Mailtrap token status and sending domain verification.</li>
<li>Live Email Log — Browse and filter delivery data pulled directly from the Mailtrap API; search by recipient address, status, or date range with automatic pagination.</li>
<li>WP-CLI commands — Command-line management via <code>wp swifttrap</code> (test, stats, prune-logs, send-suppression-sync).</li>
<li>Attachment size guard — Configurable limits to prevent oversized files from rejecting at the API gateway.</li>
<li>Test email button on the settings page.</li>
<li>Mailtrap template support via <code>template_uuid</code>.</li>
<li>Falls back to default WordPress mail handler when disabled or token is empty.</li>
</ul>
<h4>Extensible via filters</h4>
<ul>
<li><code>swifttrap_mailtrap_email_category</code> — override the auto-detected email category.</li>
<li><code>swifttrap_mailtrap_use_bulk_stream</code> — force a message into the bulk or transactional stream.</li>
<li><code>swifttrap_mailtrap_template</code> — send via a Mailtrap template by <code>template_uuid</code>.</li>
<li><code>swifttrap_mailtrap_custom_variables</code> — attach tracking metadata to outgoing emails.</li>
</ul>
<h4>Privacy</h4>
<p>This plugin sends email payloads (recipients, subject, body, attachments) to the Mailtrap API at <code>send.api.mailtrap.io</code> and <code>bulk.api.mailtrap.io</code>. Account stats and email logs are fetched from <code>mailtrap.io/api/accounts</code> and <code>mailtrap.io/api/email_logs</code>. See the <a href="https://mailtrap.io/privacy-policy" rel="nofollow ugc">Mailtrap Privacy Policy</a>. No data is sent anywhere else.</p>


SwiftTrap for Mailtrap

Send WordPress emails through the Mailtrap Email API (not SMTP). Bulk and transactional streams, categories, suppression list, email log.

Ninja Mail vs SwiftTrap for Mailtrap