: The answer is often the IPv4 address found in the first Received hop (e.g., 192.168.x.x ).
The From field shows a legitimate-looking address (e.g., admin@company.com ). mail access_4.txt
The Return-Path or the actual sending server in the Received header reveals a different, malicious domain. 3. Locate the Flag/Credential Depending on the specific platform: : The answer is often the IPv4 address
: Often an IP from a known malicious range or a private network address that shouldn't be sending external mail. mail access_4.txt
: Scan for fields like from [IP ADDRESS] or (authenticated bits=0) . 2. Identify the Forged Sender