How to trace spam email

In this post we will try an interesting topic: the spam that continually recieve to our email. Let's use an example a mail that I receive, and indicate that you should update the data of a bank to unlock your account.



For starters we see several details that can make us suspect: in the first paragraph tells us that there was a problem with an account of Bankia (spanish bank), however in the origin and the rest of the email it told that is from BBVA (another spanish bank).

Viewing the source code of the message, see the IP from which the mail, in this case 81.94.206.18