Free Email Header Analyzer
Email headers contain critical information about the origin, routing, authentication, and delivery of every email message. Our free email header analyzer parses complex header data into a clear, visual format, showing hop-by-hop routing, authentication results (SPF, DKIM, DMARC), delivery delays, and potential security issues.
What This Tool Checks
Comprehensive analysis powered by Vysiro's scanning engines
Complete header parsing and visualization
Hop-by-hop routing trace with timestamps
SPF, DKIM, and DMARC authentication results
Delivery delay identification between hops
Sender IP geolocation and reputation check
Header forgery detection
Received chain analysis
Message-ID and threading analysis
How It Works
Get results in seconds with our automated scanning process
Copy the full email headers from your email client
Paste the headers into the analyzer text area
Our engine parses each header field and value
The routing path is reconstructed with timing data
Authentication results are extracted and validated
You get a visual trace with delay analysis and security checks
Frequently Asked Questions
Everything you need to know about email header analyzer
How do I find email headers?
In Gmail: Open the email, click the three dots menu, select 'Show original'. In Outlook: Open the email, click File > Properties, look at 'Internet headers'. In Apple Mail: View > Message > All Headers. Copy the entire header text and paste it into our analyzer.
What information do email headers contain?
Email headers contain the sender and recipient addresses, subject, date, message ID, routing path (Received headers), authentication results (SPF, DKIM, DMARC), the originating IP address, mail server information, and various processing flags.
How can email headers help detect phishing?
Headers reveal the true origin of an email. Check the Received headers from bottom to top to trace the actual sending server. If the originating IP does not match the claimed sender's known mail servers, or if authentication (SPF/DKIM/DMARC) fails, the email may be spoofed.
Why are my emails delayed?
Our analyzer shows the time spent at each hop in the delivery chain. Common causes of delay include greylisting, content filtering, DNS resolution issues, server overload, and network congestion. The hop with the longest delay is highlighted in the analysis.
What do SPF, DKIM, and DMARC results in headers mean?
These are authentication checks. SPF=pass means the sending server is authorized. DKIM=pass means the email signature is valid. DMARC=pass means the email passes domain policy. Any 'fail' result indicates a potential spoofing attempt or misconfiguration.
Can email headers be forged?
Some headers (like From, Subject) can be forged. However, Received headers added by intermediate servers are difficult to forge convincingly. Our analyzer identifies potentially forged headers by checking for inconsistencies in timestamps, IP addresses, and server names.
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