API2 Addpop error - Sorry, the given email address is invalid.

Hi. We have the same problem with API 2 and AddPop using WHM JSON
/json-api/cpanel?cpanel_jsonapi_apiversion=2&cpanel_jsonapi_module=Email&cpanel_jsonapi_func=addpop&domain="example.com"&email="user"&password="12345luggage"&quota="500"
We get the same result: Sorry, the given email address is invalid. Somebody have a idea of what is wrong? BR Stian