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.

Valentin Bora

<p>Are your contact form emails disappearing? Customers not getting order confirmations? Password reset emails never arriving?</p>
<p>This plugin helps you find out why. It checks whether your domain is set up correctly for email, and then goes a step further: it sends a real test email from your site and tells you exactly what inbox providers like Gmail and Outlook see when your email arrives.</p>
<p>Most email tools, even ones with a “send test email” button, only confirm the message left your site by delivering it to your own inbox. But a letter mailed to your own house always arrives; that tells you nothing about whether a customer’s inbox would accept it. This plugin sends a real test email to an independent grader that reads what actually arrived, and tells you exactly what Gmail and Outlook see: whether you pass SPF, DKIM and DMARC, which service delivered it, and whether your sending address is blacklisted.</p>
<h4>What you’ll learn</h4>
<p><strong>Is your domain set up for email?</strong></p>
<ul>
<li>Can inbox providers verify your emails are real (SPF)</li>
<li>Do your emails carry a digital signature (DKIM)</li>
<li>Are fake emails pretending to be you getting blocked (DMARC)</li>
<li>Can your domain receive email (MX records)</li>
<li>Which email service your domain uses</li>
</ul>
<p><strong>Do your emails actually pass security checks?</strong></p>
<p>Send a real test email from your site and see what happens when it arrives:</p>
<ul>
<li>Does it pass the sender verification check</li>
<li>Is the digital signature valid</li>
<li>Does it pass the anti-spoofing check</li>
<li>Does the sender address match your domain</li>
<li>Which service actually delivered the email (Google, SendGrid, Amazon SES, and others)</li>
</ul>
<h4>More features</h4>
<ul>
<li><strong>Works with any email setup</strong> – whether you use an SMTP plugin (WP Mail SMTP, Post SMTP, FluentSMTP, etc.) or your host’s built-in email, this plugin tests whatever your site actually uses to send mail</li>
<li><strong>Site Health integration</strong> – email checks appear on your WordPress Site Health screen alongside your other site diagnostics</li>
<li><strong>Weekly monitoring</strong> – get an email notification if your domain’s email records change unexpectedly</li>
<li><strong>Email report</strong> – send yourself a summary of the results to share with your developer or hosting provider</li>
<li><strong>Score out of 10</strong> – a simple score that tells you how your email setup compares to best practices</li>
</ul>
<h4>How it works</h4>
<ol>
<li>Activate the plugin and go to Tools > Does My Email Work</li>
<li>Click “Check my domain” — the plugin checks your domain’s public email records (the same records Gmail and Outlook already see when you send email)</li>
<li>The check then automatically sends a test email from your site so the service can see what inbox providers would receive</li>
<li>Get a clear report of what’s working and what needs attention</li>
</ol>
<h4>External Services</h4>
<p>This plugin connects to the following external services to perform its diagnostic functions:</p>
<p><strong>doesmyemail.work API</strong><br />
Used to look up your domain’s public email records and process test email results. For the record lookup, the plugin sends your site’s domain name to this service. Email reports are generated and sent locally by the plugin – no email addresses are transmitted to this service.</p>
<p>When you choose to run a deep check, your site sends a test email to a unique address at doesmyemail.work, and also sends the public DNS records (SPF, DKIM, DMARC, and MX) the plugin already collected for your own domain, so the service can correlate them with the received email. The email’s routing and authentication metadata (From address, Return-Path, sending IP, detected mail service, SPF/DKIM/DMARC results, DKIM key strength, and sending-IP blacklist status) is analyzed and stored for up to 7 days, then automatically deleted. No email body content is stored or read.</p>
<ul>
<li>Service operated by Mach10 (mach10.pro)</li>
<li><a href="https://doesmyemail.work/terms/" rel="nofollow ugc">Terms of Use</a></li>
<li><a href="https://doesmyemail.work/privacy/" rel="nofollow ugc">Privacy Policy</a></li>
</ul>
<p><strong>Cloudflare DNS (used by the doesmyemail.work service)</strong><br />
The DNS record lookups happen on the doesmyemail.work servers, which use Cloudflare’s public resolver (1.1.1.1) to query your domain’s SPF, DKIM, DMARC, and MX records. Your WordPress site does not contact Cloudflare directly; it only connects to doesmyemail.work. No personal data beyond your domain name is involved.</p>
<ul>
<li><a href="https://www.cloudflare.com/privacypolicy/" rel="nofollow ugc">Cloudflare Privacy Policy</a></li>
<li><a href="https://developers.cloudflare.com/1.1.1.1/privacy/public-dns-resolver/" rel="nofollow ugc">1.1.1.1 resolver commitment</a></li>
</ul>


Does My Email Work – Email Deliverability Test

Email deliverability test for WordPress. See if your emails reach the inbox or land in spam, and exactly what Gmail and Outlook receive.

SignEmail SMTP & DNS Diagnostic vs Does My Email Work – Email Deliverability Test