The need for email validated identification arises because forged addresses and content are otherwise easily created—and widely used in spam, phishing and other email-based fraud. For example, a fraudster may send a message claiming to be from "sender@example.com", with the goal of convincing the recipient to accept and to read the email—and it is difficult for recipients to establish whether to trust this message. System administrators also have to deal with complaints about malicious email that appears to have originated from their systems, but did not.