Paste email headers
Open the email source (Show Original / View Source), copy the headers or the full raw email and paste it here. The analysis runs without storing data.
Header HealthMissing headers, duplicates, invalid lines and oversized values.
Origin candidateFirst public IP from the chronological Received chain.
Auth alignmentSPF, DKIM, DMARC, Return-Path, DKIM d= and smtp.mailfrom.
Received anomaliesClock skew, large delays, localhost, private IP and unusual protocols.
Message-ID checkFormat validation and Message-ID domain comparison with From.
JSON reportCopy the report for further processing with one click.