SetUserSpamBlackList()
From Rackspace Email & Apps API
This function will reset the user's blacklist to the list provided. Please note that the domain blacklist + the user's blacklist will both be applied to incoming email messages.
Parameters
Five strings:
Administrative username, Administrative password, Domain name, User ID, Black list (comma delimited list of domain names and email addresses to be considered as spam)
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.