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

Eduardo Marcolino

Mailtrap for WordPress

Easily test your wordpress emails without spamming real customers using mailtrap.io.

Renato Alves

WP Mailtrap

WP Mailtrap is a simple plugin to test emails in WordPress with the Mailtrap API.

IGNITE®

Better Email

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>


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