Email header analyzer
Paste a raw email and read it back in plain language — the authentication verdicts, the path it took to reach the inbox, and every header in between.
What the headers tell you
Every email carries a stack of headers above the message you read — a running log written by each server that touched it on the way to your inbox. Most mail apps hide them, but they're where the answers live when a message looks suspicious, lands in spam, or takes hours to arrive.
This tool reads three things out of that log. First, the authentication results: whether the receiving server could prove the message really came from the domain in the From line.
Authentication
The SPF, DKIM and DMARC verdicts the mailbox recorded. A pass means the sender proved who they are; a fail is worth a second look.
Delivery path
Each relay the message passed through, oldest first, with the time it spent at each one. A long gap shows you exactly where it stalled.
Every header
The full, unfolded list — From, Return-Path, Message-ID and the rest — so you can check the fields a spoofed message gets wrong.
Analyze a message
Open the original or raw source of an email and paste it below. Nothing is uploaded — the parsing happens entirely in your browser.
Everything is parsed in your browser. The message never leaves this page.