Please start Thunderbird in https://support.mozilla.org/en-US/kb/troubleshoot-mode-thunderbird

If the problem still happens, check Error Console (ctrl+shift+J) for errors.

Please let us know the results.

Thank you very much. Unfortunately I am getting on for 90 years of age and I did what you suggested but then I don't understand what I am being told and so am wary of doing the wrong thing. xx

It's OK - I understand your concern.

Knowing that you are receiving new mail is helpful information.

So I have few questions: 1. When you say "The Inbox on my Thunderbird emails shows 224 messages but do not open" do you mean that clicking on a message does not display it? 2. When you say "I have tried ... deleting but to no avail." do you mean that clicking on a message and hitting the delete key has no effect? 3. Did starting in Troubleshoot Mode help? 4. What is your version number shown at Help > About?

I see in https://support.mozilla.org/en-US/questions/1565734 you commented about deleting emails.

p.s. I know the system here can be confusing - please try your best to post your replies into your original question about a subject.

You can see your list of questions at https://support.mozilla.org/en-US/user/songthrush1/questions, the most recent is at the top. (To help avoid confusion, I have locked a couple of your earlier questions which appear to be duplicates)

Mavis' information transferred from another posting...

"Wayne Mery asked me 4 questions. The answers are l. No, the 224 message number is blank. 2. Nothing to click on. 3. Starting in troubleshoot mode did not help.4. My version number show at Help is 147.0.1. (64-bit) currently on the release update channel"