Having the same issue that it appears everyone else is having w/ the 7520. Scan to Email has stopped working despite no change in settings, it finding and being connected to the network and the wireless test report passing in all categories. Select scan to email, processes and finds which email to select from those stored, select the email, processes but then is no longer able to connect to the web services and complete the task. Despite a hard USB connection also will not find the attached computer to try to scan direct. Crossing my fingers that the solution that you've helped others with worked otherwise I'll ditch the HP and not come back. Need the function ASAP.
Thanks for your help in advance!