Xfinity says it is on Thunderbirds end. All my information entered is correct. I need my emails back ON MY pc! 10 years. It started with a Microsoft update that completely erased my whole Thunderbird emails and I was prompted to completely set up my accounts. I did my main one with IMAP. It verified my information and then wanted me to give permission because of security issues to go to Xfinity pop up. I logged in there. Then Thunderbird says it can't get to the server. Xfinity says everything is fine on my end and even helped walk me through the set up. I reinstalled Thunderbird and rebooted. Xfinity believes it is Thunderbird's problem. This is a bummer. At least I have email on my little phone, but I need it and all my old stuff back on my computer. The error message from Thunderbird in yellow is "Unable to login at server. Probably wrong configuration or password. " All is correct according to Xfinity/Comcast. Please help.