Spot on, Jordie. Many individuals do not even consider the possibility that an individual could place in new line and carriage returns and therefore add headers as they please. The BCC, slash, CC headers are the crucial ones as if you're allowed to enter more of those then spam has just been made a whole lot easier. I've seen an abundance of scripts vulnerable to that so people really need to think on before they go ahead and simply code. It's not as simple as all that.

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The man who comes back through the Door in the Wall will never be quite the same as the man who went out.