Special Character limits

Posting on behalf of a client

 I need to know if my website forms need to have special character limits e.g. (#*?>), as Raisers Edge won't accept them, or if all special characters are allowed?

for example a last name field may be "Thronton-Jones" so the "-" should be accepted, on the email field it @ should be accepted and in a free comments box it should accept characters such as ,?!$%&*^)(<>/"':;[]{}+_

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