{"id":299930,"date":"2026-04-25T18:17:26","date_gmt":"2026-04-25T18:17:26","guid":{"rendered":"https:\/\/wordpress.org\/plugins\/smtp-dkim\/"},"modified":"2026-04-25T18:17:36","modified_gmt":"2026-04-25T18:17:36","slug":"signemail-smtp-dns-diagnostic","status":"publish","type":"plugin","link":"https:\/\/wordpress.org\/plugins\/signemail-smtp-dns-diagnostic\/","author":23477818,"comment_status":"closed","ping_status":"closed","template":"","meta":{"version":"2.4.37","stable_tag":"2.4.37","tested":"6.9.4","requires":"5.8","requires_php":"8.0","requires_plugins":null,"header_name":"SignEmail SMTP & DNS Diagnostic","header_author":"SMTPDKIM","header_description":"Send WordPress emails via SMTP. Verify SPF, DKIM and DMARC records. DKIM signing available in the Premium version.","assets_banners_color":"cee7f4","last_updated":"2026-04-25 18:17:36","external_support_url":"","external_repository_url":"","donate_link":"","header_plugin_uri":"https:\/\/smtp-dkim.com","header_author_uri":"https:\/\/profiles.wordpress.org\/smtpdkim\/","rating":0,"author_block_rating":0,"active_installs":0,"downloads":65,"num_ratings":0,"support_threads":0,"support_threads_resolved":0,"author_block_count":0,"sections":["description","installation","faq","changelog"],"tags":{"2.4.37":{"tag":"2.4.37","author":"smtpdkim","date":"2026-04-25 18:17:36"}},"upgrade_notice":[],"ratings":[],"assets_icons":{"icon-128x128.png":{"filename":"icon-128x128.png","revision":3515405,"resolution":"128x128","location":"assets","locale":""}},"assets_banners":{"banner-772x250.png":{"filename":"banner-772x250.png","revision":3515405,"resolution":"772x250","location":"assets","locale":""}},"assets_blueprints":{},"all_blocks":[],"tagged_versions":["2.4.37"],"block_files":[],"assets_screenshots":{"screenshot-1.png":{"filename":"screenshot-1.png","revision":3515405,"resolution":"1","location":"assets","locale":""},"screenshot-2.png":{"filename":"screenshot-2.png","revision":3515405,"resolution":"2","location":"assets","locale":""},"screenshot-3.png":{"filename":"screenshot-3.png","revision":3515405,"resolution":"3","location":"assets","locale":""}},"screenshots":[],"jetpack_post_was_ever_published":false},"plugin_section":[],"plugin_tags":[17561,6930,267,450,6696],"plugin_category":[41],"plugin_contributors":[261057],"plugin_business_model":[],"class_list":["post-299930","plugin","type-plugin","status-publish","hentry","plugin_tags-deliverability","plugin_tags-dkim","plugin_tags-email","plugin_tags-mail","plugin_tags-smtp","plugin_category-communication","plugin_contributors-smtpdkim","plugin_committers-smtpdkim"],"banners":{"banner":"https:\/\/ps.w.org\/signemail-smtp-dns-diagnostic\/assets\/banner-772x250.png?rev=3515405","banner_2x":false,"banner_rtl":false,"banner_2x_rtl":false},"icons":{"svg":false,"icon":"https:\/\/ps.w.org\/signemail-smtp-dns-diagnostic\/assets\/icon-128x128.png?rev=3515405","icon_2x":false,"generated":false},"screenshots":[{"src":"https:\/\/ps.w.org\/signemail-smtp-dns-diagnostic\/assets\/screenshot-1.png?rev=3515405","caption":""},{"src":"https:\/\/ps.w.org\/signemail-smtp-dns-diagnostic\/assets\/screenshot-2.png?rev=3515405","caption":""},{"src":"https:\/\/ps.w.org\/signemail-smtp-dns-diagnostic\/assets\/screenshot-3.png?rev=3515405","caption":""}],"raw_content":"<!--section=description-->\n<p>\ud83d\udea8 Are your WordPress emails going to spam?<\/p>\n\n<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>\n\n<p>SignEmail SMTP helps you send reliable WordPress emails using professional SMTP servers, with optional DKIM authentication support.<\/p>\n\n\n\n<h4>Why email authentication matters<\/h4>\n\n<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>\n\n\n\n<h4>\ud83d\udcec SMTP Email Delivery<\/h4>\n\n<p>Send all WordPress emails through reliable SMTP servers instead of PHP mail(), improving deliverability and consistency.<\/p>\n\n<h4>\u2699\ufe0f Universal SMTP Compatibility<\/h4>\n\n<p>Compatible with Gmail, Outlook, Brevo, cPanel, OVH, Infomaniak, SiteGround, GoDaddy, Bluehost, WP Engine, Kinsta, Namecheap, Gandi, o2switch, LWS, and more.<\/p>\n\n<h4>\ud83d\udd0d Email Testing Tool<\/h4>\n\n<p>Send test emails to verify inbox delivery and diagnose spam placement in real conditions.<\/p>\n\n<h4>\ud83d\udd0e DNS Diagnostic Tool<\/h4>\n\n<p>Check SPF, DKIM, and DMARC records using Cloudflare DNS-over-HTTPS.<\/p>\n\n<h4>\ud83d\udd12 Secure Storage<\/h4>\n\n<p>SMTP credentials are encrypted using AES-256-CBC and stored securely in your WordPress database.<\/p>\n\n<h4>\ud83c\udf10 Multilingual Support<\/h4>\n\n<p>Full French and English interface with per-user language selection.<\/p>\n\n\n\n<h4>SMTP Features<\/h4>\n\n<ul>\n<li>Full SMTP configuration (SSL \/ TLS \/ STARTTLS \/ None)<\/li>\n<li>Encrypted password storage (AES-256-CBC)<\/li>\n<li>Force sender email and name<\/li>\n<li>Debug logging system<\/li>\n<li>Built-in email test tool<\/li>\n<li>DNS verification (SPF \/ DKIM \/ DMARC)<\/li>\n<li>Compatible with WooCommerce, CF7, Elementor, Gravity Forms, BuddyPress, LearnDash, etc.<\/li>\n<li>Fully intercepts wp_mail()<\/li>\n<\/ul>\n\n\n\n<h4>Optional DKIM Support<\/h4>\n\n<p>DKIM email signing is available in the <strong>Premium version<\/strong> of this plugin \u2014 smtp-dkim.com.<\/p>\n\n<ul>\n<li>Works alongside SMTP delivery<\/li>\n<li>Improves inbox trust and deliverability<\/li>\n<\/ul>\n\n<h4>Security &amp; Privacy<\/h4>\n\n<ul>\n<li>SMTP credentials encrypted before storage<\/li>\n<li>No credentials are sent to external servers<\/li>\n<li>License verification (if used) only transmits license key + domain name<\/li>\n<li>No email content is ever transmitted externally<\/li>\n<\/ul>\n\n\n\n<h3>External Services<\/h3>\n\n<p>This plugin connects to the following external services:<\/p>\n\n<h4>1. Cloudflare DNS-over-HTTPS<\/h4>\n\n<p>Used by the DNS Diagnostic tool to check SPF, DKIM, and DMARC records.<\/p>\n\n<ul>\n<li>Service: Cloudflare DNS-over-HTTPS API<\/li>\n<li>Endpoint: https:\/\/cloudflare-dns.com\/dns-query<\/li>\n<li>Data sent: Domain name and DKIM selector (no personal data)<\/li>\n<li>When: Only when the admin manually runs the DNS diagnostic tool<\/li>\n<li>Terms of Service: https:\/\/www.cloudflare.com\/terms\/<\/li>\n<li>Privacy Policy: https:\/\/www.cloudflare.com\/privacypolicy\/<\/li>\n<\/ul>\n\n<h4>2. User-configured SMTP server<\/h4>\n\n<p>Used to deliver WordPress emails via the SMTP protocol.<\/p>\n\n<ul>\n<li>Service: Any SMTP server configured by the site administrator (e.g. Gmail, Outlook, Brevo, cPanel)<\/li>\n<li>Data sent: Email content as configured by WordPress (wp_mail)<\/li>\n<li>When: Every time WordPress sends an email<\/li>\n<li>Terms of Service and Privacy Policy: Refer to your SMTP provider<\/li>\n<\/ul>\n\n<h4>3. smtp-dkim.com \u2014 License validation (Premium version only)<\/h4>\n\n<p>The Premium version validates the license key to enable DKIM signing.<\/p>\n\n<ul>\n<li>Endpoint: https:\/\/smtp-dkim.com\/wp-json\/sdlm\/v1\/validate<\/li>\n<li>Data sent: License key + domain name only \u2014 no email content, no SMTP credentials<\/li>\n<li>When: On plugin activation and periodically in the background<\/li>\n<li>Terms of Service: https:\/\/smtp-dkim.com\/politique-de-confidentialite\/<\/li>\n<li>Privacy Policy: https:\/\/smtp-dkim.com\/politique-de-confidentialite\/<\/li>\n<\/ul>\n\n<p>Note: The free version available on WordPress.org does not include license validation or DKIM signing.<\/p>\n\n<!--section=installation-->\n<ol>\n<li>Upload plugin folder to \/wp-content\/plugins\/<\/li>\n<li>Activate plugin<\/li>\n<li>Open SignEmail SMTP menu in WordPress admin<\/li>\n<li>Configure SMTP settings<\/li>\n<li>Run email test<\/li>\n<li>(Optional) Configure DKIM if supported by your mail provider<\/li>\n<li>Run DNS diagnostic tool<\/li>\n<\/ol>\n\n<!--section=faq-->\n<dl>\n<dt id=\"does%20the%20plugin%20work%20without%20dkim%3F\"><h3>Does the plugin work without DKIM?<\/h3><\/dt>\n<dd><p>Yes. SMTP email delivery works fully without DKIM.<\/p><\/dd>\n<dt id=\"is%20any%20data%20sent%20to%20external%20servers%3F\"><h3>Is any data sent to external servers?<\/h3><\/dt>\n<dd><p>No SMTP credentials or email content are ever sent externally.<\/p><\/dd>\n<dt id=\"can%20i%20test%20email%20delivery%3F\"><h3>Can I test email delivery?<\/h3><\/dt>\n<dd><p>Yes, built-in test tool allows sending emails to verify inbox or spam placement.<\/p><\/dd>\n<dt id=\"is%20it%20compatible%20with%20woocommerce%3F\"><h3>Is it compatible with WooCommerce?<\/h3><\/dt>\n<dd><p>Yes, it integrates with all WordPress email systems using wp_mail().<\/p><\/dd>\n<dt id=\"can%20i%20move%20configuration%20between%20sites%3F\"><h3>Can I move configuration between sites?<\/h3><\/dt>\n<dd><p>Yes, settings can be exported and reused.<\/p>\n\n<\/dd>\n\n<\/dl>\n\n<!--section=changelog-->\n<h4>2.4.37 \u2013 April 23, 2026<\/h4>\n\n<ul>\n<li>Improved compatibility with WordPress.org plugin guidelines<\/li>\n<li>Configuration summary card now shows DKIM section status consistently<\/li>\n<li>External test email section: description text simplified and always visible<\/li>\n<\/ul>\n\n<h4>2.4.36 \u2013 April 23, 2026<\/h4>\n\n<ul>\n<li>SMTP debug log now stored in wp-content\/uploads\/ with .htaccess and index.php protection<\/li>\n<li>External Services section expanded with Cloudflare Terms of Service and Privacy Policy links<\/li>\n<li>Removed deactivation feedback form<\/li>\n<\/ul>\n\n<h4>2.4.35 \u2013 April 21, 2026<\/h4>\n\n<ul>\n<li>Updated language strings to neutral terminology<\/li>\n<li>Removed redundant UI notices from settings page<\/li>\n<li>Fixed SMTP debug log button flickering during live email test polling<\/li>\n<li>Moved all CSS and JavaScript to properly enqueued external files<\/li>\n<\/ul>\n\n<h4>2.4.30 \u2013 April 19, 2026<\/h4>\n\n<ul>\n<li>Improved live SMTP debug log writing during email send<\/li>\n<li>Minor UI improvements to settings page fields<\/li>\n<\/ul>\n\n<h4>2.4.20 \u2013 April 13, 2026<\/h4>\n\n<ul>\n<li>DNS diagnostic improvements and card layout fixes<\/li>\n<li>Configuration summary card moved to top of settings page<\/li>\n<\/ul>\n\n<h4>2.3.9 \u2013 April 6, 2026<\/h4>\n\n<ul>\n<li>Added external email test tool<\/li>\n<li>UX improvements for DNS setup guidance<\/li>\n<\/ul>\n\n<h4>2.3.0 \u2013 April 2, 2026<\/h4>\n\n<ul>\n<li>WordPress 6.9 compatibility confirmed<\/li>\n<li>General stability improvements<\/li>\n<\/ul>\n\n<h4>2.2.0 \u2013 March 28, 2026<\/h4>\n\n<ul>\n<li>Auto-update support added<\/li>\n<li>General improvements<\/li>\n<\/ul>\n\n<h4>2.0.0 \u2013 March 3, 2026<\/h4>\n\n<ul>\n<li>Major refactor of internal architecture<\/li>\n<li>General stability improvements<\/li>\n<\/ul>\n\n<h4>1.0.0 \u2013 March 1, 2026<\/h4>\n\n<ul>\n<li>Initial release<\/li>\n<\/ul>","raw_excerpt":"Stop WordPress emails from going to spam. Send emails via SMTP and check SPF, DKIM, DMARC records to improve email deliverability.","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin\/299930","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin"}],"about":[{"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/types\/plugin"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/comments?post=299930"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wporg\/v1\/users\/smtpdkim"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/media?parent=299930"}],"wp:term":[{"taxonomy":"plugin_section","embeddable":true,"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_section?post=299930"},{"taxonomy":"plugin_tags","embeddable":true,"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_tags?post=299930"},{"taxonomy":"plugin_category","embeddable":true,"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_category?post=299930"},{"taxonomy":"plugin_contributors","embeddable":true,"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_contributors?post=299930"},{"taxonomy":"plugin_business_model","embeddable":true,"href":"https:\/\/wordpress.org\/plugins\/wp-json\/wp\/v2\/plugin_business_model?post=299930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}