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Free Email Tool
Parse and decode raw email headers to trace delivery paths, identify delays, and debug authentication failures (SPF, DKIM, DMARC alignment).
A silent SPF or DKIM change can quietly send your emails to spam for weeks before anyone notices. Drop your email and we'll alert you the moment something looks off, so you fix it in minutes, not after a deliverability cliff.
Check every aspect of your email infrastructure
Mailsoftly handles SPF, DKIM & DMARC automatically. Campaigns, automation, and analytics in one place.
Free to start with your Google Workspace account. No credit card required.
This free email header analyzer parses raw email headers and turns them into a readable delivery report: every server hop with its timestamp and delay, the authentication results for SPF, DKIM and DMARC, and key fields such as Return-Path, Reply-To and Message-ID. Headers are the flight recorder of an email, so this is the fastest way to find out where a message was delayed, which server sent it, and why it failed authentication or landed in spam.
In Gmail, open the message, click the three dot menu and choose Show original. In Outlook, open the message and go to File, then Properties, and copy the Internet headers box. In Yahoo Mail, use More, then View raw message. Copy everything from the first Received line to the end, paste it into the analyzer above, and it will reconstruct the delivery path and authentication results for you.
