How It Works
Analyze raw internet headers in four steps
Paste Raw Headers
Extract the internet headers (original source) from Gmail/Outlook and paste them.
Local MIME Parsing
Our browser-based parser extracts metadata, fields, and custom X-headers privately.
Build Hops Timeline
We reconstruct the Received headers stack to calculate delay latencies between mail hops.
Security Diagnostics
Get detailed validation reviews of SPF, DKIM, DMARC alignment, and authentication results.
Analyze Raw Email Headers
Paste the complete MIME header blocks below to parse routing steps and authentication parameters.
Why Use Our Email Header Analyzer?
The safest, fastest, and most detailed tool to parse email headers and trace mail delivery health.
100% Private Local Parsing
MIME header files are parsed entirely in your browser window. No email content or corporate metadata is ever uploaded to external servers, protecting business privacy.
Hop Delay Diagnostics
Our analyzer translates Received tags to a graphical hops route timeline, automatically calculating delivery latency and server queues bottlenecks.
Authentication Audits
Inspect SPF validation results, DKIM keys alignment selectors, DMARC security policy outcomes, and forwarder ARC authentication blocks in one view.
Trusted by Sysadmins & Postmasters
What professionals are saying about our email header analyzer
"This tool parsed an email header chain in milliseconds and showed us exactly which hop had a 45-minute delay due to misconfigured graylisting rules. Incredible diagnostics."
Marcus Aurel
IT Administrator
"Because it parses the headers locally in the browser, I don't have to worry about security or data compliance when inspecting raw headers for clients."
Laura Green
SEO Architect
"Great representation of SPF, DKIM, and DMARC alignments. Extremely useful for debugging sender failures when testing SMTP email setups."
Steve Rogers
System Engineer
Latest Articles & Guides
Expert tips to parse headers and secure your email delivery
How to Read and Analyze Raw Email Headers
A complete guide to uncovering hidden metadata inside raw email headers to trace routing hops, sender addresses, and validation headers.
Understanding Received Headers and SMTP Routing Hops
Learn how to trace the path of an email through SMTP servers by analyzing Received headers, identifying transit delays and origin IPs.
How to Verify SPF, DKIM, and DMARC in Email Headers
Understand authentication results headers to confirm if email signatures, sender authorizations, and domain policies pass validation.
Frequently Asked Questions
An email header is a block of metadata containing diagnostic information about the email's origins, routing path, content type, format, and authentication tests. It is hidden from standard message views.
In Gmail, choose 'Show original' from the message menu. In Outlook, view the 'Internet headers' box in the message properties. In Apple Mail, select View > Message > Raw Source.
Every mail server that relays your email adds a new 'Received' header at the top of the list. These logs allow parsers to chart the path from sender to receiver, including transit times and server IPs.
Yes. Our Email Header Analyzer runs 100% locally in your browser using Client-Side Javascript. Your headers are parsed locally and are never transmitted to our servers, keeping your information private.
SPF validates that the sender's IP is authorized in the domain's DNS. DKIM verifies that the email signature has not been modified since sending. DMARC ensures both alignments are correct.