SetUserMailForward()
From Rackspace Email & Apps API
This function will set a list of addresses to forward mail orginally sent to a particular email address and can set whether to save a copy of the email in the original recipient's mailbox.
Input Parameters
Five strings and one integer:
Administrative username, Administrative password, Domain name, User name, Address list (comma delimited list of addresses to forward mail to; no more than 4 outside the domain), Save copy (int, 1=save a copy, 0=don't save a copy)
Return Values
If successful, the return value of the function will be 1.
Consult the Result Code Table for a list of result codes and their meaning.