SetDomainSpamBlackList()
From Rackspace Email & Apps API
This function will reset the domain blacklist to the list provided.
Parameters
Four strings:
Administrative username, Administrative password, Domain name, 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.