Should I undo html special chars?

I set up a simple contact/email form with php verification.

In a contact form I set up should I undo html special chars when the message is sent to the office so that customer messages aren't altered?

What is industry standard?
burnedfacelessAsked:
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Carl BohmanCommented:
If you have a simple form, you are likely just taking in plain text, right?  There shouldn't be a need to undo special characters in a case like that, since there won't be any.

However, if what you are concerned about is a user embedding malicious code in their message, then I would go ahead and escape everything they submit using a standard function (like PHP's htmlspecialchars) to prevent execution.  Just keep in mind that you will then need to unescape it to use it in a text-only context.
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burnedfacelessAuthor Commented:
How do you unescape it? And in what part of the process do you do this?
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burnedfacelessAuthor Commented:
I guess before you mail it?
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burnedfacelessAuthor Commented:
I'm just going to leave it. If I tweak it too much I'll have to keep my email in it longer.
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