Tip to Find IP Address of the email sender in Gmail
When you receive an email, you receive more than just the message. The email comes with headers that carry important information that can tell where the email was sent from and possibly who sent it. For that, you would need to find the IP address of the sender. The tutorial below can help you find the IP address of the sender.
1) Log into your Gmail account with your username and password.
2) Open the mail.
3) On the left side of mail header you find a drop down list. Click on drop down list, you should get a bunch of links. Click on Show original as shown in the image.
4) A new page will open containing maximum information of email sender including IP address.