(1) The text at the beginning of an email message. The header is generated by the client mail program that first sends it and by all the mail servers en route to the destination. Each node adds more ...

A record sent by clients and servers communicating with each other via the HTTP protocol. The header is a stream of text that may be sent without any content following it or with the content that it ...

I pretty frequently get requests for help from someone who has been impersonated—or whose child has been impersonated—via email. Even when you know how to “view headers” or “view source” in your email ...