https://senderaudit.com/blog/en/tags/gmail/Recent content in Gmail on Sender Audit BlogHugoenTue, 05 May 2026 00:00:00 +0000https://senderaudit.com/blog/en/why-email-goes-to-spam/Tue, 05 May 2026 00:00:00 +0000https://senderaudit.com/blog/en/why-email-goes-to-spam/<p>Your emails aren&rsquo;t reaching the inbox? Before blaming Gmail or Outlook, it helps to understand how these filters work. Modern algorithms combine <strong>dozens of signals simultaneously</strong>. This article covers them in order of real-world impact, from most critical to least.</p> <hr> <h2 id="1-dns-authentication-the-absolute-prerequisite">1. DNS Authentication: The Absolute Prerequisite</h2> <p>This is the number one cause of emails landing in spam. Without proper authentication, you&rsquo;re a stranger to receiving servers.</p> <h3 id="spf-sender-policy-framework">SPF (Sender Policy Framework)</h3> <p>The SPF record declares which IP addresses are authorized to send emails for your domain. If your sending IP isn&rsquo;t listed, the receiving server may reject or flag the message.</p>