While there are over 90 emails on the Comcast server so far this morning, only 1 has been downloaded. I tried repairing the folders but no change. While I can save chunks of email on the server, my import of a zip file of them is not working. This has continued to be a problem for over 48 hours. I am using Thunderbird 128.4.3 under Windows 11 Pro 23H2. I can see notifications of emails downloading from the server but nothing is posted on my machine. This process repeats each time I start up Thunderbird but no new emails are accessible, either from Comcast or Gmail. Emails are coming in fine on my iPhone but not on to my ThinkPad where I download and store them off the Comcast server. Two days ago there were thousands of past emails on the server going back to earlier this year but they are all gone now. I have found it impossible to access Comcast's technical support for their help in solving this problem. 11/17/24 It took 3 days but rebuilding of the global-messages database has finished at 6.7 Gbytes. Unfortunately, no change and the Comcast server is filling up. Any suggestions? Thank you for your consideration