GrL'Ca MailGuard

Email delivery monitor for WordPress. Logs every sent and failed email, detects type, enables one-click resend. Zero configuration to start.

Author:GrL'Ca (profile at wordpress.org)
WordPress version required:6.2
WordPress version tested:6.9.4
Plugin version:1.1.0
Added to WordPress repository:24-03-2026
Last updated:24-03-2026
Rating, %:0
Rated by:0
Plugin URI:https://grlca.com/mailguard
Total downloads:98
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Does your WordPress site silently lose emails?

A customer completes a purchase but never receives the order confirmation. A user requests a password reset that never arrives. You have no idea — everything looks fine in the admin.

WordPress has no native email log. When an email doesn’t arrive, there’s no trace of what happened, why it failed, or even whether it was sent at all.

GrL’Ca MailGuard fixes that.

It hooks directly into wp_mail() and records every single outgoing email — recipient, subject, status, SMTP response, and full error details. Zero configuration needed to start logging.

???? Complete Email Audit Trail

Every email your site sends is recorded with:

  • Recipient address and subject line
  • Delivery status (sent or failed)
  • Exact SMTP server response
  • Full error message on failure
  • Automatic email type detection (WooCommerce orders, password resets, new user registrations, and 20+ more)

???? One-Click Resend

Found a failed email in the log? Resend it directly from the log table with a single click. No copy-pasting, no manual re-triggers. The original recipient, subject, and content are used automatically.

???? SMTP Configuration

Configure your outgoing mail server with quick-select presets for the most popular providers:

  • Gmail / Google Workspace
  • Microsoft 365 / Outlook
  • SendGrid
  • Mailgun
  • Brevo (formerly Sendinblue)
  • Amazon SES
  • Any custom SMTP server

A built-in test button sends a verification email and shows the exact server response so you know immediately whether your configuration works.

???? Dashboard Widget

At-a-glance delivery stats right on your WordPress dashboard — sent count, failed count, and delivery rate for the last 7 days. Plus a full activity chart with 7, 14, and 30-day ranges.

????️ Automatic Email Type Detection

MailGuard automatically classifies every email so you can filter the log by type:

wc_new_order · `wc_completed_order` · `wc_cancelled_order` · `wc_refunded_order` · `password_reset` · `new_user` · `comment_notification` · and more.

Extend with the grlca_mg_detect_email_type filter to add your own types.

⚡ Zero Configuration to Start

Activate the plugin. That’s it. MailGuard immediately begins logging every email. No API keys, no external accounts, no setup wizard required for the core functionality.

???? Free vs Pro

Feature
Free
Pro

Unlimited email log
✅
✅

One-click resend
✅
✅

SMTP configuration + presets
✅
✅

Email type detection
✅
✅

Dashboard widget + chart
✅
✅

Email alerts on failure
❌
✅

Slack notifications
❌
✅

Webhook (Make, Zapier, n8n)
❌
✅

Open + click tracking
❌
✅

Daily digest emails
❌
✅

CSV export
❌
✅

SMTP diagnostics
❌
✅

Multisite Network Admin
❌
✅ Agency plan

White-label branding
❌
✅ Agency plan

Price
Free forever
From €49 one-time

???? Learn more about MailGuard Pro

???? Compatible With Everything

  • WooCommerce (all versions) — order emails, invoices, refunds
  • All SMTP plugins (WP Mail SMTP, FluentSMTP, Easy WP SMTP…)
  • WordPress Multisite
  • Any plugin that uses `wp_mail()`
  • Custom code that calls `wp_mail()` directly

????️ Privacy

MailGuard stores email metadata (recipient, subject, status, error) in your own WordPress database. No data is sent to external servers. Email body storage is opt-in and disabled by default.

External services

This plugin optionally connects to a user-configured SMTP server to send outgoing emails. No SMTP connection is made unless the user explicitly enables and configures SMTP under MailGuard SMTP Setup.

When SMTP is enabled, the plugin sends email content (recipient, subject, message body) to the configured SMTP server each time WordPress sends an email via wp_mail(). The plugin includes quick-select presets for the following third-party SMTP providers:

Users may also enter any custom SMTP server of their choice. The plugin does not send any data to external servers unless the user explicitly configures and enables SMTP. All email log data is stored locally in the WordPress database.

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