What is an Email Header Analyzer?
An email header analyzer is a message header analyzer tool that makes email headers human readable by parsing them according to RFC 822 and related standards. Every email you receive carries hidden technical details — the message source — packed with information about the sender, routing path, authentication results, and delivery time.
Our email header analyzer tool extracts that metadata and presents it in an easy to read, structured report so you can instantly understand what happened between the sending server and your inbox — without touching raw header data manually.
Origin: 203.0.113.45 · 4 server hops
Why Use Our Email Header Analyzer?
Use our email header analyzer to go from raw headers to actionable insight in seconds
Instant Decoding
Parse raw email headers and get a clear, human-readable breakdown of every field — no manual lookup required.
Threat Detection
Spot forged senders, mismatched authentication, and suspicious relay behavior that signals phishing or spoof attempts.
Deliverability Insights
See SPF, DKIM, and DMARC passed or failed details that directly affect whether an email lands in the inbox or spam folder.
Forensic Detail
Trace sending IPs, timestamps, and hop-by-hop routing for incident response and email analysis workflows.
Privacy-First
Email headers are analyzed in-memory and not stored unless you choose to save results. Your header data stays yours.
Key Features
Everything you need to analyze email headers and protect your domain
Automatic Header Parsing
The tool automatically extracts and groups message headers — From, Return-Path, Received, Message-ID, Content-Type, ARC-Seal, ARC-Authentication-Results, and MIME fields — unfolding wrapped lines and surfacing what matters most in every email message.
Authentication Checks
Check SPF record lookup and evaluation, DKIM signature verification with selector and identity checks, and DMARC authentication policy alignment — all in one pass.
IP & Geo Lookup
Map the email's originating IP address, reveal sending networks and ASNs, surface geolocation data, and check whether an IP appears on a known blacklist.
Relay Path Visualization
A clear timeline and hop list shows server hops, delays, loops, and any suspicious relay behavior between mail servers — with date and time stamps per hop.
Threat Scoring
Combined heuristics score each message to highlight phishing, spam, or spoof risk — helping you quickly decide whether the email was sent legitimately.
Exportable Reports
Download JSON or PDF reports for incident logs, compliance records, or to forward findings to your security or IT team. Every piece of IP information and email authentication detail is included.
How to Use an Email Header Analyzer
Analyze email headers in four straightforward steps
Copy the Full Header
Export the full header from your email client — Gmail, Outlook, Apple Mail, or your mail server. Use the "Show original" or "View message source" option to get the complete, untruncated full header.
Paste the Header in the Tool
Copy and paste the raw message headers directly into the input area and click "Analyze." You can also upload an email file (.eml) if your client supports export.
The Tool Analyzes Email Headers
The header analyzer tool decodes and parse every field, runs SPF, DKIM, and DMARC checks, performs an IP address lookup, and scores the message for risk — all within the email system automatically.
Review and Export
Review the structured report, follow recommended remediation steps, or export the full email analysis for your records, compliance requirements, or DNS configuration review.
Benefits for Teams
A message header analyzer tool built for every role that touches email security
Security Teams
Rapid incident triage for phishing attacks, BEC attempts, and malicious emails. Use the sender's IP, authentication results, and threat score to detect phishing fast and protect your domain.
IT Admins
Troubleshoot email delivery issues, anti-spam misconfiguration, and problematic mail servers. Understand the sender's routing path and whether the email was sent through expected infrastructure.
Developers & DevOps
Validate email authentication during deployments and CI checks. Confirm that sending IPs, DKIM selectors, and DMARC policies are correctly configured before you ship.
Help Desks
Provide clear evidence and guidance to end users about suspicious emails. Translate technical message headers into plain language explanations that anyone can act on.
Sample Report Highlights
When the tool analyzes email headers, you get a structured report with actionable analytics across four key areas:
Authentication Summary
SPF PASS, DKIM FAIL, DMARC QUARANTINE — with exact DNS records, signature details, and guidance on what each result means for email security and deliverability.
Origin Details
Sending IP 203.0.113.45 (AS12345), hosted in Frankfurt, DE — with full geolocation, network, and IP information including blacklist status.
Relay Timeline
4 hops, 2-minute total transit, unusual delay at hop 3. The routing section makes message content flow and server handoffs visible at a glance.
Risk Assessment
High likelihood of spoofing due to domain mismatch and missing DKIM. The checker surfaces information sent to the recipient that differs from the information about the email's true origin.
Frequently Asked Questions
Common asked questions about our email header analyzer
Is it safe to paste email headers?
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Yes. Message headers do not contain full email message content, but may include sender addresses and IP address data. We analyze in-memory and do not store header data by default. For sensitive investigations, use our Enterprise on-premises option.
What authentication checks are performed?
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The tool runs SPF record lookup and evaluation, DKIM signature verification with selector and identity checks, and DMARC policy alignment and reporting guidance — covering the full stack of email authentication standards.
Can I automate header analysis?
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Yes. Pro and Enterprise plans include an API for automated header analysis and integration into ticketing, SIEM, or anti-spam systems — so you can authenticate and analyze every email you receive at scale without manual effort.
How do I trace an email back to its origin?
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To trace an email, copy the full message headers from your email client and paste them into the analyzer. The tool maps the email's originating IP address, shows each server hop with timestamps, and surfaces the sender's IP and network information for a complete origin trail.
Can I use this tool to troubleshoot email delivery issues?
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Absolutely. The relay timeline shows exactly where delays occur within the email path between mail servers. Combined with the authentication summary and IP lookup, you can quickly identify whether the email was sent through misconfigured infrastructure or whether the email's deliverability problem is a DNS, DKIM, or SPF configuration issue.