TempMailitoFree email debugging tool
Email header analyzer
Paste raw email headers and inspect sender, routing, SPF, DKIM, and DMARC signals.
Header analysis
Email routing and authentication signals
This browser-side demo does not store pasted headers. Use safe test headers only.
When this helps
Use header analysis when QA emails arrive from the wrong sender, fail authentication, route through unexpected servers, or behave differently between staging and production.
Useful fields
- From shows the visible sender identity.
- Return-Path often shows bounce handling.
- Received lines show routing hops.
- SPF, DKIM, DMARC help debug authentication.
Use it with TempMailito
Receive a test email in TempMailito, copy safe headers, and inspect delivery signals here. For automated flows, combine this with temporary inboxes and API-driven QA checks.
View API docsRelated tools
FAQ
Email header analyzer questions
What can email headers show?
Headers can show sender metadata, routing hops, Message-ID, Return-Path, and authentication signals such as SPF, DKIM, and DMARC results.
Does this tool store pasted headers?
No. The analyzer runs in your browser and is intended for safe test headers rather than sensitive private messages.
Why use this with temporary email?
QA teams can inspect test emails received in temporary inboxes to debug sender identity, routing, and authentication behavior.