WordPress Email delivery

Reference articles for the WordPress mail delivery problems I see most often: contact form submissions that never arrive, password reset emails that go missing, and WooCommerce order notifications that land in spam or fail silently. WordPress reports success even when the message was never delivered, which is what makes these problems hard to notice until a customer complains.

Each article maps the failure to one of three layers: WordPress and wp_mail, the hosting MTA and PHP mail, and DNS authentication with SPF, DKIM and DMARC. Start with the symptom that matches, then work outward until the chain delivers end to end.

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  1. Why WordPress is not sending email and how to fix it

    Contact form submissions, password resets and order notifications never arrive. This guide walks you through diagnosing and fixing WordPress email at the WordPress, hosting and DNS layer.

    2562 words
  2. WordPress SMTP: sending email via an external mail provider

    WordPress hands every email to PHP's mail() function, which most hosts either block or ship from an unauthenticated IP. This walkthrough sets up an SMTP plugin that routes WordPress mail through a real sending service that actually delivers.

    3078 words
  3. SPF, DKIM and DMARC for WordPress email deliverability

    WordPress emails land in spam because the server sending them is not authenticated as authorized to send for your domain. SPF, DKIM and DMARC are the three DNS records that fix that. This article explains what each one does, why all three are mandatory in 2026, and how to publish them in the right order without breaking legitimate mail.

    3364 words
  4. WooCommerce order and transactional emails not sending

    Customer order confirmations, processing notifications and failed-order alerts in WooCommerce are missing. This guide walks through the WooCommerce-specific causes (order status lifecycle, HPOS compatibility, background queue) and the WordPress-level delivery problems underneath them.

    3668 words

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