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是否可以通过Android SDK的Facebook SDK读取用户收件箱？因为，我已经设置了扩展权限read_mailbox，但我收到错误消息：Android应用程序中的Facebook read_mailbox权限
{Response: responseCode: 403, graphObject: null, error: {HttpStatus: 403, errorCode: 298, errorType: OAuthException, errorMessage: (#298) Requires extended permission: read_mailbox}}