AddUserSpamIPBlackList()
From Rackspace Email & Apps API
This function will add one or more entries to the existing IP address blacklist for a given user. Blacklist entries can be specific hosts (like "10.167.10.21") or simple ranges through the use of the % wildcard (like "10.167.10.%").
Parameters
Five strings:
Administrative username, Administrative password, Domain name, User ID, IP black list (formatted as "[entry]crlf[entry]crlf...")
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.