I was reading the posts in this forum but I have trouble finding out the IP from an email I sent myself from my hotmail account to my yahoo account (both web based). Here are the headers taken from yahoo:
Authentication-Results: mta376.mail.mud.yahoo.com from=hotmail.com; domainkeys=neutral (no sig)
Received: from 188.8.131.52 (EHLO snt0-omc1-s7.snt0.hotmail.com) (184.108.40.206) by mta376.mail.mud.yahoo.com with SMTP; Sat, 25 Apr 2009 15:00:23 -0700
Received: from SNT105-W32 ([220.127.116.11]) by snt0-omc1-s7.snt0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Sat, 25 Apr 2009 15:00:23 -0700
Content-Type: multipart/alternative; boundary="_f7584c52-6517-4bfd-9733-ace8fbbf967d_"
How would it be possible to determine the IP from this header?
Looks like you sent the email via the web interface. Which means, the header is only going to contain the hotmail server information.
In this case the IP showing is 18.104.22.168.