Hi, Is it possible to determine the originating IP address from a yahoo email where it appears the user used their web interface?
Received: from sonic.gate.mail.ne1.yahoo.com by sonic315.consmr.mail.ne1.yahoo.com with HTTP; Mon, 30 Oct 2017 19:02:35 +0000 X-Mailer: WebService/1.1.10801 YahooMailNeo Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36 https://pastebin.com/EeM1u1rM Sometimes there is an x-originating-ip header but there doesn't appear to be anything similar here.
