Determine the User's Account Capabilities
The Yahoo! Mail Web Service limits the functionality available to
free accounts. Premium accounts have no such limits. First call the
GetUserData method to get the user’s account type from the
Web service.
Account Types
- Premium Users
Premium users may access any part of the Web service. There are no restrictions.
- Non-Premium Users
Non-Premium users are restricted to the following APIs:
Calls to other APIs will return an error. To upgrade to premium, go to mailplus.mail.yahoo.com. For information on how to receive a commission for upgrading users to a premium Yahoo! Mail Plus account see the Yahoo! Mail Web Service page on the Yahoo! Developer Network.
Calling GetUserData
Call GetUserData to find out the user’s level of
service, as in the following example.