My wife and I each have a Windows 10 account on the same computer. We have Thunderbird on both our Windows accounts and we use the same email server and email address at Comcast.net. Until now, for many years we have had no problems. But today, her Thunderbird cannot retrieve messages - she gets RETR command failed. Mail server mail.comcast.net responded Message 1002 expunged. However, Thunderbird on my Windows 10 account has no problems downloading emails from that same server using the same email address. The Thunderbird settings on both our accounts are the same. She had a huge number of emails in her inbox, so she moved them to another folder to see if that would help. It didn't. If there were a server issue we both would have problems. I rebooted the computer to see if her Thunderbird software had been corrupted, but the problem remains. It appears that the 1002 refers to 10:02 am, the time the email was sent to us. Earlier attempts gave other numbers indicating later email times, so it seems to step backwards in time, perhaps because the emails were accessed by our tablet email apps, but they are still on the server.