Free Email Header Analyzer & Authentication Tracer
Paste raw email headers to analyze SPF, DKIM, DMARC Authentication-Results, routing hops, sender IP latency, and spam filter scores.
Why Cold Outbound Teams Use Our Free Header Analyzer
Authentication-Results parser
Hop-by-hop relay latency breakdown
SpamAssassin & X-Spam-Status extractor
Email Deliverability Standards (US & UK Outbound Guidelines)
In February 2024, Google Workspace and Yahoo introduced strict anti-spam enforcement rules that mandate proper SPF, DKIM, and DMARC authentication for all outbound mailboxes. If your DNS records have syntax errors or exceed the 10-lookup threshold, incoming mail servers will silently route your cold outreach into the Spam folder or reject connections entirely.
Requires valid physical postal address in signatures, accurate From header identification, and clear opt-out mechanics.
Permits B2B outreach under legitimate interest when targeted to relevant corporate decision-makers with authenticated sender identity.
Frequently Asked Questions About Header Analyzer
How do I find raw email headers in Gmail?
Open the email, click the three dots (More options) on the top right, and click "Show original". Copy the entire text into our Header Analyzer.
Need Pre-Warmed Mailboxes Ready to Send?
Get fully authenticated, pre-warmed business inboxes on your own domains with dedicated US & UK IPs for just $4.00/mailbox/month.