IP Subnet CalculatorEmail Header Analyzer
Paste raw message headers to trace the delivery path, check SPF/DKIM/DMARC verdicts and alignment, read spam scores, and spot spoofing — without squinting at 200 lines of text.
Authentication & verdicts
Message summary
Delivery path
Hops run oldest → newest. The Delay column shows how long each server held the message — the hop with the big number is where a delivery delay happened.