openaienmodel: gpt-5-mini-2025-08-07
Email Service - Preview sent emails in the Activity log
Key Points
- Preview sent email content in Activity log
- View HTML, text, headers, attachments, raw RFC 5322
- Previews retained ~7 days; enable per sending domain
Summary
You can now preview the full content of sent emails directly from the Email Service Activity log. Open a sent message and use the new Preview section to inspect the rendered HTML body, text body, headers, attachments, and the full raw RFC 5322 source to speed up debugging of rendering, content, and delivery issues.
Key Points
- Preview tabs: Rendered HTML, Text body, Headers, Attachments, and Raw RFC 5322 source.
- Enablement: Turn on Email preview in your sending domain's settings to capture previews. Previews are created only for messages sent while the setting is enabled.
- Retention: Message previews are retained for approximately seven days.
- Default behavior: Sending domains onboarded on or after 2026-07-02 have Email preview enabled automatically.
- Use cases: Troubleshoot rendering bugs, verify headers and attachments, inspect raw source for authentication or formatting issues.
Actions for engineers
- If you need previews for existing domains, enable Email preview in each sending domain's settings.
- For automated debugging, combine Activity log previews with your Email logs and delivery metadata.
Refer to Email logs in the docs for additional query and retention details.