Free Email Header Analyzer: Parse & Trace Email Headers Instantly

Email headers contain a wealth of information hidden from normal email views — the full server-to-server delivery path, authentication results (SPF, DKIM, DMARC), timestamps, delays, IP addresses, and spam scores.

Paste your raw email headers below and our analyzer will break them down into a clear, human-readable format. Ideal for investigating delivery failures, phishing attempts, or email routing issue.

Email Header Analyzer

Paste the raw email headers (or the full message source) into the box below.

All analysis is done in your browser. Headers are never sent to our servers.

Message Summary

From	{{ parsed.from }}
To	{{ parsed.to }}
Subject	{{ parsed.subject }}
Date	{{ parsed.date }}
Message-ID	{{ parsed.messageId }}
Reply-To	{{ parsed.replyTo }}
Content-Type	{{ parsed.contentType }}
X-Mailer	{{ parsed.xMailer }}
Originating IP	{{ parsed.xOrigIP }}

Authentication Results

{{ auth.key.toUpperCase() }}: {{ auth.result }} {{ auth.detail }}

No authentication results found in headers.

Spam Score: {{ parsed.spamScore }} Lower is better. Above 5 is often flagged as spam.

Spam Status: {{ parsed.xSpamStatus }}

Delivery Path ({{ parsed.hops.length }} Hop{{ parsed.hops.length > 1 ? 's' : '' }})

The series of mail servers the message passed through before reaching its destination, in chronological order.

From: {{ hop.from }} → By: {{ hop.by }} via {{ hop.with }}

Delay: {{ hop.delay >= 3600 ? Math.floor(hop.delay/3600) + 'h ' : '' }}{{ Math.floor((hop.delay % 3600) / 60) > 0 ? Math.floor((hop.delay % 3600) / 60) + 'm ' : '' }}{{ hop.delay % 60 }}s

IP: {{ hop.ip }}

All Parsed Headers

Header	Value
{{ h.key }}	{{ h.value }}

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How to Get Headers

How to Find Email Headers in Your Client

Gmail

Open the email → click the 3-dot menu (⋮) → select "Show original" → copy the full content.

Outlook

Open the email → File → Properties → copy the text in the "Internet headers" box.

Apple Mail

Open the email → View menu → Message → All Headers, or use ⌘⇧H.

Yahoo Mail

Open the email → click More icon → View Raw Message. Copy the header section at the top.

FAQ

Frequently Asked Questions

What information can I find in email headers?

Email headers contain: the full server-to-server delivery path, sender and recipient IP addresses, date/time at each hop, authentication results (SPF, DKIM, DMARC), spam scores, content type, and X-header metadata added by mail servers and clients.

Are my email headers shared with your servers?

No. All analysis is performed entirely in your browser using JavaScript. Your email headers are never sent to our servers, ensuring complete privacy.

How do I read the delivery path?

The delivery path shows each server the email passed through from sender to inbox. Hop 1 is the original sender's mail server; the last hop is your receiving mail server. Large delays between hops indicate where delivery was slow.

What does SPF pass/fail mean?

SPF (Sender Policy Framework) verifies that the sending server is authorized to send email on behalf of the From domain. SPF pass means the server is listed in the domain's SPF record; fail or softfail means it's not authorised, which may indicate spoofing or misconfiguration.

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