https://senderaudit.com/blog/en/tags/headers/Recent content in Headers on Sender Audit BlogHugoenMon, 20 Apr 2026 00:00:00 +0000https://senderaudit.com/blog/en/email-headers-explained/Mon, 20 Apr 2026 00:00:00 +0000https://senderaudit.com/blog/en/email-headers-explained/<p>Email headers contain the complete story of a message&rsquo;s journey: who sent it, which servers it passed through, whether authentication succeeded, and why it landed in spam. Knowing how to read them means knowing how to diagnose.</p> <h2 id="how-to-access-headers">How to Access Headers</h2> <ul> <li><strong>Gmail</strong>: open the email → ⋮ → &ldquo;Show original&rdquo;</li> <li><strong>Outlook</strong>: open the email → File → Properties → &ldquo;Internet headers&rdquo;</li> <li><strong>Apple Mail</strong>: View → Message → All Headers</li> <li><strong>Thunderbird</strong>: View → Message Source</li> </ul> <p>Or paste them directly into Sender Audit&rsquo;s <a href="https://senderaudit.com/header-analyzer">Header Analyzer</a> for a visual analysis.</p>