What is an Email Header Analyzer?
The nameindia.tech Email Header Analyzer lets you dig deep into any email by extracting and displaying information such as the source IP address, authentication status, routing hops, and other technical details hidden inside the raw header. Email headers reveal the full journey an email took from the sender's mail server to your inbox — information that is invisible in a standard email client but invaluable for troubleshooting and security investigations.
How our Email Header Analyzer works
nameindia.tech provides a suite of tools to help you inspect and manage the technical aspects of email and domain infrastructure. The Email Header Analyzer is one of our most powerful tools. Copy the original raw message source from your email client and paste it into the text box on this page. Once you click Analyze, the tool parses and presents the data in three clearly organized sections: message details, hop details, and other details.
The message details section shows the sender name, subject, origin date, and message ID. The hop details section traces the multiple mail servers an email passed through before reaching its final destination, including timestamps and any delays at each hop. The other details section covers authentication status, TLS encryption, ARC seals, MIME version, content type, and other technical fields carried inside the header.
What can the Email Header Analyzer do?
Analyze sender information — by examining the sender's IP address, authentication status, and email routing path, you can quickly determine whether an email came from a legitimate source or a suspicious one.
Identify spam and phishing attempts — if authentication checks fail, or if the routing path shows unusual detours through unexpected servers, you can flag the sender as spam and take appropriate action.
Trace the email route — the hop details section shows every mail server the email passed through, including the from and to addresses at each step, timestamps, transmission delays, and the protocol used.
Components of an email header
Authentication results cover the three core email authentication mechanisms — SPF, DKIM, and DMARC — which work together to verify the sender's identity and protect against spoofing. Our analyzer shows the result of each check alongside any additional detail reported in the header.
The return path is the address to which an email is delivered if it fails at the recipient's server. It is best practice to use a dedicated address for collecting bounced messages and monitoring delivery issues.
The sender path indicates which mail server originated the email and lists the SMTP relay path taken during delivery. Multiple hops in this path show each touchpoint the email passed through before reaching you.
ARC seal stands for Authenticated Received Chain. It is a standard similar to DKIM that captures a snapshot of the authentication state of an email as it passes through intermediary servers. Like DKIM, its values are pass, fail, or none.
The content type field describes the format of the email body and specifies any encoding applied to the message.
MIME (Multipurpose Internet Mail Extension) is the internet standard that handles attachments in emails, including audio, video, images, and documents. Most emails use MIME version 1.0.
TLS (Transport Layer Security) is the encryption protocol that protects email in transit, preventing eavesdropping or tampering as the message moves between servers.
The List-Unsubscribe field contains the address you can use to opt out of future emails from the sender.
Frequently Asked Questions
How can you prevent email header phishing?
Examining the email header is one of the most effective ways to identify phishing attempts. The header contains all the information you need to verify the sender's identity and trace the email's origin. By checking authentication results, source IP addresses, and routing paths with our analyzer, you can spot red flags that are invisible in the normal email view.
How do I use the Email Header Analyzer?
Open the email you want to analyze in your email client and look for the option to view the original or raw message — in Gmail this is "Show original", in Outlook it is "View message source", and in Apple Mail it is "View → Message → Raw Source". Copy the entire content of that window and paste it into the text box on this page, then click Analyze. Our tool will immediately display a full breakdown of the header.
Is my email data safe when using this tool?
Yes. The nameindia.tech Email Header Analyzer processes everything directly in your browser. Your header content is never transmitted to our servers, so your email data remains entirely private on your own device.
What do SPF, DKIM, and DMARC mean?
SPF (Sender Policy Framework) checks whether the sending server is authorized to send mail on behalf of the domain. DKIM (DomainKeys Identified Mail) uses a cryptographic signature to verify that the message content has not been altered in transit. DMARC (Domain-based Message Authentication, Reporting and Conformance) ties SPF and DKIM together and tells receiving servers what to do when an email fails these checks. A pass on all three is the strongest signal that an email is legitimate.
What does the hop delay tell me?
The delay shown at each hop is the time difference between when the email arrived at one server and when it arrived at the next. Small delays of a few seconds are normal. Long delays of several minutes or more may indicate a slow or overloaded relay server, spam filtering, or deliberate throttling — all useful signals when troubleshooting email delivery problems.