Suddenly without making any changes my PC will no longer send email thru Outlook 2010 using Windows XP. ISP is Verizon and I get the message " Your e-mail server rejected your login" My UID and PW are correct as I can log into webmail fine. Have spent 3 solid days with Verizon tech support who points the finger at MS, Norton who points to MS and MS would points back to Verizon. I'm frustrated beyond imagination! Verizon says MS Office 2010 probably doesn't work with XP and that's the problem. I loaded 2010 in July and it's been working great with NO problems until 3 days ago. Outlook will send yaho, hotmail just not a verizon email. I have unistalled Office 2010 and reinstalled - no change. Verizon wants me to reinstall the OS - is that necessary? I feel that a file has become become corrupted, but I don't know how to fix it. ANyone have any hints or ideas? This is insane - tech support for sw these days is a joke.