Received headers show the path an email took across servers. Learn how to read them and identify sender IPs.
Received headers are added by servers as an email moves through the internet. They form a hop-by-hop trail that can help identify where the message originated and how it was relayed.
They’re useful for troubleshooting delays, spotting spoofing patterns, and extracting sender IP clues. Interpreting them correctly means reading from bottom to top in most cases.