smtpdkim

<p>🚨 Are your WordPress emails going to spam?</p>
<p>Without proper email authentication, services like Gmail, Outlook, and Yahoo may block or mark your emails as spam. This results in lost notifications, password resets, and order emails.</p>
<p>SignEmail SMTP helps you send reliable WordPress emails using professional SMTP servers, with optional DKIM authentication support.</p>
<h4>Why email authentication matters</h4>
<p>Modern email providers require proper authentication (SPF, DKIM, DMARC) to trust your messages. Without it, even valid emails may be filtered as spam.</p>
<h4>📬 SMTP Email Delivery</h4>
<p>Send all WordPress emails through reliable SMTP servers instead of PHP mail(), improving deliverability and consistency.</p>
<h4>⚙️ Universal SMTP Compatibility</h4>
<p>Compatible with Gmail, Outlook, Brevo, cPanel, OVH, Infomaniak, SiteGround, GoDaddy, Bluehost, WP Engine, Kinsta, Namecheap, Gandi, o2switch, LWS, and more.</p>
<h4>🔍 Email Testing Tool</h4>
<p>Send test emails to verify inbox delivery and diagnose spam placement in real conditions.</p>
<h4>🔎 DNS Diagnostic Tool</h4>
<p>Check SPF, DKIM, and DMARC records using Cloudflare DNS-over-HTTPS.</p>
<h4>🔒 Secure Storage</h4>
<p>SMTP credentials are encrypted using AES-256-CBC and stored securely in your WordPress database.</p>
<h4>🌐 Multilingual Support</h4>
<p>Full French and English interface with per-user language selection.</p>
<h4>SMTP Features</h4>
<ul>
<li>Full SMTP configuration (SSL / TLS / STARTTLS / None)</li>
<li>Encrypted password storage (AES-256-CBC)</li>
<li>Force sender email and name</li>
<li>Debug logging system</li>
<li>Built-in email test tool</li>
<li>DNS verification (SPF / DKIM / DMARC)</li>
<li>Compatible with WooCommerce, CF7, Elementor, Gravity Forms, BuddyPress, LearnDash, etc.</li>
<li>Fully intercepts wp_mail()</li>
</ul>
<h4>Optional DKIM Support</h4>
<p>DKIM email signing is available in the <strong>Premium version</strong> of this plugin — smtp-dkim.com.</p>
<ul>
<li>Works alongside SMTP delivery</li>
<li>Improves inbox trust and deliverability</li>
</ul>
<h4>Security & Privacy</h4>
<ul>
<li>SMTP credentials encrypted before storage</li>
<li>No credentials are sent to external servers</li>
<li>License verification (if used) only transmits license key + domain name</li>
<li>No email content is ever transmitted externally</li>
</ul>
<h3>External Services</h3>
<p>This plugin connects to the following external services:</p>
<h4>1. Cloudflare DNS-over-HTTPS</h4>
<p>Used by the DNS Diagnostic tool to check SPF, DKIM, and DMARC records.</p>
<ul>
<li>Service: Cloudflare DNS-over-HTTPS API</li>
<li>Endpoint: https://cloudflare-dns.com/dns-query</li>
<li>Data sent: Domain name and DKIM selector (no personal data)</li>
<li>When: Only when the admin manually runs the DNS diagnostic tool</li>
<li>Terms of Service: https://www.cloudflare.com/terms/</li>
<li>Privacy Policy: https://www.cloudflare.com/privacypolicy/</li>
</ul>
<h4>2. User-configured SMTP server</h4>
<p>Used to deliver WordPress emails via the SMTP protocol.</p>
<ul>
<li>Service: Any SMTP server configured by the site administrator (e.g. Gmail, Outlook, Brevo, cPanel)</li>
<li>Data sent: Email content as configured by WordPress (wp_mail)</li>
<li>When: Every time WordPress sends an email</li>
<li>Terms of Service and Privacy Policy: Refer to your SMTP provider</li>
</ul>
<h4>3. smtp-dkim.com — License validation (Premium version only)</h4>
<p>The Premium version validates the license key to enable DKIM signing.</p>
<ul>
<li>Endpoint: https://smtp-dkim.com/wp-json/sdlm/v1/validate</li>
<li>Data sent: License key + domain name only — no email content, no SMTP credentials</li>
<li>When: On plugin activation and periodically in the background</li>
<li>Terms of Service: https://smtp-dkim.com/politique-de-confidentialite/</li>
<li>Privacy Policy: https://smtp-dkim.com/politique-de-confidentialite/</li>
</ul>
<p>Note: The free version available on WordPress.org does not include license validation or DKIM signing.</p>


SignEmail SMTP & DNS Diagnostic

Stop WordPress emails from going to spam. Send emails via SMTP and check SPF, DKIM, DMARC records to improve email deliverability.

mmediasoftwarelab

<p>Deliverability Inspector is a free diagnostic tool that helps you verify your email authentication and deliverability configuration. Ensure your emails reach the inbox by checking all critical DNS records and SMTP settings.</p>
<p><strong>Key Features:</strong></p>
<ul>
<li><strong>SPF Record Check</strong> – Verify Sender Policy Framework configuration</li>
<li><strong>DKIM Verification</strong> – Check DomainKeys Identified Mail with custom selector support</li>
<li><strong>DMARC Policy Check</strong> – Validate Domain-based Message Authentication</li>
<li><strong>MX Records</strong> – Confirm mail exchange servers are configured</li>
<li><strong>PTR/Reverse DNS</strong> – Check server IP reverse DNS lookup</li>
<li><strong>SMTP Test</strong> – Send test emails to verify mail delivery works</li>
</ul>
<p><strong>Perfect For:</strong></p>
<ul>
<li>WordPress site owners sending transactional emails</li>
<li>Email marketers ensuring deliverability</li>
<li>Developers setting up new WordPress installations</li>
<li>Anyone troubleshooting email delivery issues</li>
</ul>
<p><strong>Why Use Deliverability Inspector?</strong></p>
<p>Email deliverability is critical for WordPress sites. Whether you’re sending order confirmations, password resets, or newsletters, proper email authentication prevents your messages from landing in spam folders.</p>
<p>This plugin provides a comprehensive dashboard showing the status of all major email authentication protocols in one place, with actionable recommendations for fixes.</p>
<p><strong>Free & Open Source</strong></p>
<p>Deliverability Inspector is completely free with no premium upsells required for core functionality. Use it to verify your email setup is production-ready.</p>
<p><strong>Works With M Media Dispatch</strong></p>
<p>Once your deliverability checks pass, consider using <a href="https://www.mmediasoftwarelab.com/product/mmedia-dispatch/" rel="nofollow ugc">M Media Dispatch</a> to send professional email campaigns via your own SMTP server – no recurring email marketing costs!</p>
<h3>External services</h3>
<p>This plugin connects to Google’s public DNS over HTTPS (DoH) API as a fallback when the server’s native DNS resolver cannot retrieve records.</p>
<p><strong>Service:</strong> Google Public DNS over HTTPS<br />
<strong>Purpose:</strong> Resolving TXT, MX, and A DNS records for the domain being checked (SPF, DKIM, DMARC, MX lookups) when PHP’s <code>dns_get_record()</code> returns no results.<br />
<strong>What is sent:</strong> The domain name being queried and the DNS record type requested.<br />
<strong>When it is sent:</strong> Only when native DNS resolution fails for a given check. No data is sent on most servers where native DNS works correctly.<br />
<strong>Provider:</strong> Google LLC<br />
<strong>Terms of service:</strong> https://developers.google.com/terms<br />
<strong>Privacy policy:</strong> https://policies.google.com/privacy</p>
<p>No personal user data (names, emails, IP addresses of site visitors, etc.) is ever sent to this service  –  only the domain name being inspected.</p>
<h3>Privacy Policy</h3>
<p>Deliverability Inspector performs DNS lookups and optional SMTP tests using your WordPress server. No data is sent to external services except:</p>
<ul>
<li>DNS queries to public DNS servers (standard internet protocol)</li>
<li>Optional test email via your configured SMTP server</li>
</ul>
<p>No personal data is collected, stored, or transmitted to M Media or any third parties.</p>
<h3>Support</h3>
<p>For support, visit <a href="https://www.mmediasoftwarelab.com/support/" rel="nofollow ugc">M Media Support</a></p>
<h3>Credits</h3>
<p>Developed by <a href="https://www.mmediasoftwarelab.com/" rel="nofollow ugc">M Media</a></p>


M Media Email Deliverability Inspector

Comprehensive email deliverability diagnostics tool - checks SPF, DKIM, DMARC, PTR, MX records, and SMTP configuration.

SignEmail SMTP & DNS Diagnostic vs M Media Email Deliverability Inspector