I have an issue with Thunderbird version 143.0.1 on Windows 11. Everything worked Tuesday (9/23) evening and then nothing worked on Wednesday (9/24) morning. The problem is that Thunderbird can’t retrieve email on either of my 2 different email accounts from different servers. The error message says “There is not enough space to download new messages.” This is simply not true – I have 1 TB of free space. I can send outgoing messages, but they can’t be saved to the Sent folder.

What is the full error message.

Here are the steps I’ve taken: Tried compacting – Error message says “..could not be compacted because writing to folder failed.” Deleted a bunch of old Trash messages – Made no difference Cleared the Thunderbird cache – Made no difference Created a new profile – Could download messages, but when I close Thunderbird and reopen it, the can’t download problem reappears. What happened on Thunderbird’s side of things between Tuesday evening and Wednesday morning? Anybody else have this issue?

Please start Windows in safe mode with networking enabled - https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode

Does the problem change?

Booting in Safe mode did nothing to fix the problem.

The error message says:

There is not enough disk space to download new messages. Try deleting old mail, emptying the Trash folder and compacting your mail folders, and then try again.

I can add that I keep the email folders on 1 computer that is home networked to my desktop computer. I use Thunderbird on my desktop to access the email on the other computer through my home network . This has worked well for months until last Wednesday. All of my network settings allow for full control.

I can access my database data files and MS Word files through my home network, but now not Thunderbird email files. Any suggestions? Thanks