(authenticated)
Changes the email address of an account.
http://blablalist.com/changeemail? authid=622c895dec2d96cf127f0d557785d200& submission=changeEmail& email=johnsmith@othercompany.com& email2=johnsmith@othercompany.com
<changeemail authid="622c895dec2d96cf127f0d557785d200"> <success/> </changeemail>