AddUserSpamSafeList()
From Rackspace Email & Apps API
This function will add one or more entries to the existing safelist for a given mailbox. Safelist entries can be either domain names ("example.com") or email addresses ("info@example.com").
Parameters
Five strings:
Administrative username, Administrative password, Domain name, User ID, Safe 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.