What can email headers tell me?

Headers reveal authentication results, routing hops, sending systems, and clues about spoofing or delivery failures.

Where can I find full headers in Gmail?

Open the message, click the three-dot menu, and choose Show original to inspect full headers.

What should I check first in headers?

Start with Authentication-Results for SPF, DKIM, and DMARC status, then review Received chain order.

Why are there multiple Received lines?

Each mail server that handles a message adds one Received entry, creating a trace of delivery path.

Can headers confirm phishing attempts?

Headers can strongly indicate spoofing or suspicious routing, especially when auth fails or domains do not align.

Email Header Analyzer - Decode SPF, DKIM, DMARC (Free)

The Email Header Analyzer decodes the technical metadata attached to every email. It reveals how the email traveled across the internet and what authentication checks were performed along the way.

Email Header Analyzer

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