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Mail Doctor replaces WordPress’ default <code>wp_mail</code> stack with authenticated SMTP or provider APIs plus the operational tooling fast-moving stores need. It is written for merchants, agencies, and reliability teams that want hard proof their receipts, fulfillment notices, and alerts land every time.
<h4>Feature Highlights</h4>
<ul>
<li>Deliverability with guardrails – Route WooCommerce or all site email through your preferred SMTP/API provider, lock the From identity, and fail over gracefully when third-party endpoints go dark.</li>
<li>One-click diagnostics – Send live tests with TLS/auth badges, latency metrics, DNS posture (SPF/DKIM/DMARC), and actionable warnings the moment something drifts.</li>
<li>Reliable retries & queue control – Automatic exponential backoff, manual retry orchestration, Action Scheduler integration, and a “run queue now” control for urgent flushes.</li>
<li>Deep visibility – Searchable logs with <code>.eml</code> downloads, header/body inspection, filterable status views, and CSV exports for audits.</li>
<li>Email template workflow – Version history, diff previews, modal device switcher, and send-test flows for the WooCommerce template editor.</li>
<li>Automation surface – REST API endpoints and WP-CLI commands mirror UI actions so you can script smoke tests, tail logs, or trigger retries in CI/CD pipelines.</li>
<li>Privacy-first options – Hash or redact recipients, tune retention windows, and honour GDPR requests through the bundled exporters/erasers.</li>
<li>Operational alerts – Instant Slack/email failure alerts plus weekly digests summarising throughput, latency, retries, and queue health.</li>
</ul>
<h3>External Services</h3>
This plugin acts as a connector between your WordPress site and third-party email providers. When you configure an external service (SMTP or API), this plugin transmits email data to that provider for delivery.
Data Sent: 
* Sender and Recipient names and email addresses. 
* Email subject, body content (HTML/Text), and headers. 
* Timestamps and potentially the originating IP address.
When Payload is Sent: 
* Immediately whenever an email is triggered by WordPress, WooCommerce, or another plugin, if that specific provider is currently set as your active transport.
Purpose: 
* To reliably deliver transactional emails to user inboxes using the provider’s infrastructure.
Supported Services & Legal Links:
<ul>
<li>
Google / Gmail
<ul>
<li><a href="https://policies.google.com/terms" rel="nofollow ugc">Terms of Service</a></li>
<li><a href="https://policies.google.com/privacy" rel="nofollow ugc">Privacy Policy</a></li>
<li>Endpoints: <code>accounts.google.com</code>, <code>oauth2.googleapis.com</code></li>
</ul>
</li>
<li>
Microsoft / Outlook / Office 365
<ul>
<li><a href="https://www.microsoft.com/en-us/legal/terms-of-use" rel="nofollow ugc">Terms of Use</a></li>
<li><a href="https://privacy.microsoft.com/en-us/privacystatement" rel="nofollow ugc">Privacy Statement</a></li>
<li>Endpoints: <code>login.microsoftonline.com</code>, <code>outlook.office365.com</code></li>
</ul>
</li>
<li>
Twilio SendGrid
<ul>
<li>Links: <a href="https://www.twilio.com/en-us/legal/tos" rel="nofollow ugc">terms of service</a>, <a href="https://www.twilio.com/en-us/legal/privacy" rel="nofollow ugc">privacy policy</a></li>
<li>Endpoints: <code>api.sendgrid.com</code></li>
</ul>
</li>
<li>
Mailgun
<ul>
<li>Links: <a href="https://www.mailgun.com/legal/terms/" rel="nofollow ugc">terms of service</a>, <a href="https://www.mailgun.com/legal/privacy-policy/" rel="nofollow ugc">privacy policy</a></li>
<li>Endpoints: <code>api.mailgun.net</code>, <code>api.eu.mailgun.net</code> (and other region equivalents)</li>
<li>Domain validation: When you click “Verify Domain” in the plugin settings, the plugin queries <code>https://api.mailgun.net/v3/domains/{your-domain}</code> (or the EU equivalent) to check DNS records (SPF, DKIM, MX). Data sent: your Mailgun API key and the domain name. No email content is transmitted during this check.</li>
</ul>
</li>
<li>
Amazon SES
<ul>
<li>Links: <a href="https://aws.amazon.com/service-terms/" rel="nofollow ugc">terms of service</a>, <a href="https://aws.amazon.com/privacy/" rel="nofollow ugc">privacy policy</a></li>
<li>Endpoints: <code>email.us-east-1.amazonaws.com</code>, <code>email-smtp.us-east-1.amazonaws.com</code> (and other <code>*.amazonaws.com</code> region equivalents)</li>
</ul>
</li>
<li>
Postmark
<ul>
<li>Links: <a href="https://postmarkapp.com/terms" rel="nofollow ugc">terms of service</a>, <a href="https://postmarkapp.com/privacy" rel="nofollow ugc">privacy policy</a></li>
<li>Endpoints: <code>api.postmarkapp.com</code></li>
</ul>
</li>
<li>
SparkPost
<ul>
<li>Links: <a href="https://www.sparkpost.com/policies/tou/" rel="nofollow ugc">terms of service</a>, <a href="https://www.sparkpost.com/policies/privacy/" rel="nofollow ugc">privacy policy</a></li>
<li>Endpoints: <code>api.sparkpost.com</code></li>
</ul>
</li>
<li>
Brevo (formerly Sendinblue)
<ul>
<li>Links: <a href="https://www.brevo.com/legal/termsofuse/" rel="nofollow ugc">terms of service</a>, <a href="https://www.brevo.com/legal/privacypolicy/" rel="nofollow ugc">privacy policy</a></li>
<li>Endpoints: <code>smtp-relay.brevo.com</code> (SMTP relay); configurable SMTP host per your provider settings.</li>
<li>This plugin transmits the same email data (sender, recipients, subject, body) to Brevo’s SMTP relay servers when Brevo is configured as the active transport.</li>
</ul>
</li>
</ul>
OAuth Authentication Endpoints:
When you connect Google or Microsoft accounts using OAuth2, this plugin communicates with the following authentication endpoints to obtain and refresh access tokens:
<ul>
<li>
Google OAuth2
<ul>
<li>Authorization: <code>https://accounts.google.com/o/oauth2/v2/auth</code></li>
<li>Token exchange: <code>https://oauth2.googleapis.com/token</code></li>
<li>Data sent: Client ID, authorization code, and redirect URI</li>
<li><a href="https://developers.google.com/terms" rel="nofollow ugc">Google API Terms of Service</a></li>
<li><a href="https://policies.google.com/privacy" rel="nofollow ugc">Google Privacy Policy</a></li>
</ul>
</li>
<li>
Microsoft OAuth2 (Outlook/Office 365)
<ul>
<li>Authorization: <code>https://login.microsoftonline.com/{tenant}/oauth2/v2.0/authorize</code></li>
<li>Token exchange: <code>https://login.microsoftonline.com/{tenant}/oauth2/v2.0/token</code></li>
<li>Data sent: Client ID, client secret, authorization code, and redirect URI</li>
<li><a href="https://docs.microsoft.com/en-us/legal/microsoft-apis/terms-of-use" rel="nofollow ugc">Microsoft API Terms of Use</a></li>
<li><a href="https://privacy.microsoft.com/en-us/privacystatement" rel="nofollow ugc">Microsoft Privacy Statement</a></li>
</ul>
</li>
</ul>
<h4>Quick Start</h4>
<ol>
<li>Review the documentation link in the Documentation section for the full tour and terminology.</li>
<li>Configure SMTP/API credentials on WooCommerce → Mail Doctor → Settings.</li>
<li>Send a test email from the Status tab and verify DNS/auth posture.</li>
<li>Visit Logs to confirm entries are stored and retries are scheduled as expected.</li>
<li>Enable alerts and weekly digests so the team knows when to act.</li>
</ol>
<h4>Documentation</h4>
Documentation: https://wpdoctorpro.com/docs/mail-doctor/welcome-to-mail-doctor – guides, setup, troubleshooting, and support.
<h4>Privacy controls</h4>
Mail Doctor ships with built-in privacy tooling under Settings → Logging & Privacy:
<ul>
<li>Mask recipient emails: Hashes addresses before storing them in logs.</li>
<li>Redact headers and bodies: Keeps metadata only so sensitive content is not persisted.</li>
<li>Retention windows: Separate sliders for sent, failed, and payload data; shorten for stricter compliance.</li>
<li>GDPR exporter/eraser: WordPress privacy tools are wired to export or anonymise recipient rows on request.</li>
<li>Role-based access: Admin UI and AJAX endpoints are gated by <code>manage_woocommerce</code>/<code>manage_options</code>.</li>
</ul>
<h4>Troubleshooting</h4>
<ul>
<li>Red notices on the Status tab usually indicate DNS or authentication drift—re-run the onboarding checks and confirm credentials with your provider.</li>
<li>If the queue stalls, visit Settings → Retry & Queue and use Run queue now; check your cron runner or Action Scheduler if jobs remain pending.</li>
<li>Use the <code>.eml</code> download from each log entry when escalating to your SMTP provider—they can analyse the exact payload and SMTP transcript.</li>
<li>For privacy incidents, toggle Privacy Mode and shorten retention while you investigate; the GDPR exporter/eraser handles customer requests.</li>
</ul>
<h3>Support & Packaging</h3>
<ul>
<li>Requirements: WordPress 6.0+, WooCommerce (latest), PHP 8.1–8.3 with cURL/JSON; OpenSSL recommended for encrypted secret storage.</li>
<li>Included in download: <code>mail-doctor/</code> plugin folder, <code>Documentation/</code> offline HTML docs, <code>readme.txt</code>, <code>changelog.txt</code>, and <code>LICENSE</code>.</li>
<li>Support/Contact: See the Documentation section for guides and support links. When requesting help, include your WP/Woo versions, provider, and a recent log ID from Mail Doctor → Logs.</li>
</ul>

Mail Doctor

Deliver WooCommerce emails with confidence using authenticated SMTP transports, visual diagnostics, and automated retries.

Mesh Creation

Mesh SMTP helps route WordPress emails through an SMTP server for better deliverability and reliability.
It is built for site owners, agencies, and developers who want a lightweight SMTP plugin with a simple and modern admin interface.
Version 1.4.0 adds a guided four-step setup wizard, safe export/import tools for reusable SMTP settings, clearer provider guidance, and a more polished admin experience.
<h4>Features</h4>
<ul>
<li>Guided four-step setup wizard for choosing a provider, saving SMTP credentials, sending a test email, and finishing with a quick confirmation</li>
<li>Simple SMTP configuration for host, port, encryption, username, password, From Email, and From Name</li>
<li>Provider presets with auto-detect help for known email domains, SMTP hosts, and site mail-routing hints</li>
<li>Test email tool with clear success and error feedback</li>
<li>Lightweight recent email activity log with the latest 50 entries stored and the newest 10 shown in admin</li>
<li>Last failed email summary card for faster troubleshooting</li>
<li>Copyable diagnostic summary for support requests and debugging</li>
<li>wp-config.php constant overrides for secure deployment-based SMTP settings</li>
<li>Safe export and import tools for reusing settings across sites</li>
<li>Status snapshot with current SMTP configuration summary</li>
<li>Better setup hints, stronger sender guidance, and practical provider notes for popular services</li>
<li>Clean and modern admin UI</li>
<li>Capability checks, nonce verification, and sanitized settings handling</li>
<li>Passwords are not shown back in the UI after saving</li>
<li>Saved SMTP details stay intact when you temporarily disable the SMTP override</li>
<li>Works with WordPress emails sent through <code>wp_mail()</code></li>
</ul>
<h4>Supported provider presets</h4>
<ul>
<li>Gmail</li>
<li>Outlook / Microsoft 365</li>
<li>Zoho Mail</li>
<li>Hostinger</li>
<li>SendGrid</li>
<li>Mailgun</li>
<li>Custom SMTP</li>
</ul>
<h4>Why use Mesh SMTP?</h4>
Many WordPress sites face email delivery issues such as contact form emails not arriving, password reset emails failing, or transactional emails landing in spam. Mesh SMTP gives you a straightforward way to connect WordPress to a trusted SMTP provider and improve email reliability.
The plugin focuses on practical setup, safer configuration reuse across sites, lightweight diagnostics, and a clean WordPress-friendly experience.
<h4>Security notes</h4>
<ul>
<li>Settings are processed with WordPress sanitization and nonce verification</li>
<li>Access is restricted to authorized administrators</li>
<li>SMTP debug output is not exposed in the admin UI</li>
<li>Saved passwords are not displayed back in the settings form after saving</li>
<li>wp-config.php constants can override saved settings for more controlled deployments</li>
</ul>

Mesh SMTP

A lightweight WordPress SMTP plugin with guided setup, safe settings reuse, and practical email diagnostics.

Mail Doctor vs Mesh SMTP