Preventing email spoofing means there needs to be some way to verify whether an email was actually sent by the person in the From header. Obviously this was a big issue and a number of security features have been tacked on top of the email specification to prevent this from happening. This file is sent to something called an SMTP ( Simple Mail Transfer Protocol) server and that server sends the email to from the email specification, there's literally nothing preventing you from impersonating someone else by putting their email in the From field and sending a forged email. Enter fullscreen mode Exit fullscreen modeĪs you can see this file has a number of headers defining who an email is From, who it's To and some other stuff followed by the actual content.
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