Creates a new message in the user’s inbox or replaces an existing message.
mailSession object
mailsession.mailSaveMessage ( messageid, mailmessage )
mailReturnCode. Returns one of the following values:
mailReturnSuccess!
mailReturnFailure!
mailReturnInsufficientMemory!
mailReturnInvalidMessage!
mailReturnUserAbort!
mailReturnDiskFull!
If any argument’s value is null, mailSaveMessage returns null.
