Lately Verizon email over and over wants email username and password re-entered. on both windows 7 and XP laptops. Used to just click OK and it was fine. Now server won't allow email. I could just retype it but would like to know why this is happening and if I am doing anything to cause it. The XP PC is 12 years old but the W-7 only a few years. I have cleared the Firefox history "everything" but that did not previously seem to cause this. any ideas?