Email IP Leak

Email IP Leak (emailipleak.com) is a diagnostic tool that allows investigators to determine the IP address of the server that sent a specific email by analyzing the email's full header information. Investigators paste the raw email headers into the tool, which parses the Received headers to extract the originating IP address and associated geolocation data.

For OSINT investigators working fraud, phishing, and threat attribution cases, email header analysis is one of the most reliable techniques for establishing the geographic origin or hosting infrastructure of a suspicious email. When an email passes through mail servers, each server adds a Received header containing its IP address and timestamp — these headers form a chronological trail back to the original sending server.

Email IP Leak automates the parsing of these headers and provides the identified IP addresses with reverse DNS lookup, geolocation (country, city, ISP), and abuse contact information. This allows investigators to rapidly establish where an email originated without manually parsing complex SMTP header syntax.

For phishing investigation workflows, extracting the originating IP from a phishing email header can reveal the hosting infrastructure used by the attacker. This IP can then be pivoted through Shodan for open port data, queried in Censys for certificate information, checked against threat intelligence feeds, and used for passive DNS analysis to identify other domains hosted on the same infrastructure.

The geolocation data from email header analysis is particularly useful for social engineering and fraud cases where inconsistency between claimed location and technical origin is relevant. A sender claiming to be in the US but originating from an Eastern European IP address is a significant investigative signal.

Document the raw headers, the tool output, the extracted IPs, and geolocation data with timestamps in case notes.