I am including the following information in case it may have triggered the problem.Yesterday, we had a Verizon outage, which may or may not be relevant. Both of our email clients stopped receiving messages, although it was possible to send. The Verizon network status message now says that "data service may be limited" for our area and for an area nearby the message is "Data, voice, text and wireless home internet service are limited" and "There is a known issue in this area and we are working on a solution. This type of issue takes us a little longer to fix. Most are resolved within 48 hours. You can check your network status again later for updates. Check network status." The other email client is working normally now, but wasn't for most of yesterday. Yesterday, one Thunderbird profile was repeatedly asked for the password, but the correct password was not accepted. The password manager showed the failing password for the username to be the correct one. Last night and this morning, the identity remains correct and is still the default identity. Also, the outgoing server still seems to be correct. However, his morning, Thunderbird still asked for the password--but the password manager does not show the username or password in the list anymore How do I restore the username/password? Or does that have to wait until Verizon repairs its problem? The other email client had been missing pieces that were suddenly restored with any action on our part. Please note that any reply has to use simple words and phrases--trying what I have described has maxed out my technical skills and knowledge. Also, two more notes: We do not want to use one general password for all at this time. Also, there does not seem to be any problem with the computer itself.