ModifyDomainMaxMailboxSize()
From Rackspace Email & Apps API
This function will make change the base mailbox maximum size for a domain. For instance, you might change a domain's mailboxes from a base size of 25MB (no more than 25MB of email stored in a single mailbox) to 50MB.
Parameters
Three strings, one integer:
Administrative username, Administrative password, Domain name, New mailbox size (integer, MB, ust be greater than 0)
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.