Email Service - Preview sent emails in the Activity log

<p>You can now preview the content of sent emails directly from the Email Service Activity log. Expand a sent email and open the new <strong>Preview</strong> section to inspect the message as it was sent, across tabs for the rendered <strong>HTML</strong> body, the <strong>Text</strong> body, the <strong>Headers</strong>, the <strong>Attachments</strong>, and the full <strong>Raw</strong> <a href="https://datatracker.ietf.org/doc/html/rfc5322" target="_blank" rel="noopener">RFC 5322<span class="external-link"> ↗︎</span></a> source.</p> <img src="https://developers.cloudflare.com/cdn-cgi/image/onerror=redirect,width=2864,height=1172,format=webp/_astro/email-message-preview.Bj6Lk8Y6.png" alt="The rendered HTML preview of a sent email in the Email Service Activity log" loading="lazy" decoding="async" width="2864" height="1172"> <p>Previously, the Activity log surfaced delivery and authentication metadata but not the message content, making rendering and content issues harder to debug. Message preview closes that gap.</p> <p>To make messages previewable, turn on <strong>Email preview</strong> in your sending domain's settings. Previews cover messages sent while the setting is turned on and are retained for about seven days. Sending domains onboarded on or after 2026-07-02 have <strong>Email preview</strong> turned on automatically.</p> <img src="https://developers.cloudflare.com/cdn-cgi/image/onerror=redirect,width=2256,height=264,format=webp/_astro/email-preview-setting.XEd1WIiO.png" alt="The Email preview setting in a sending domain's settings" loading="lazy" decoding="async" width="2256" height="264"> <p>Refer to <a href="https://developers.cloudflare.com/email-service/observability/logs/#message-preview">Email logs</a> for more information.</p>