Thunderbird updated and then on one of my Gmail accounts I kept getting an error message saying, “Unable to write the email to the mailbox. Make sure the system allows you write privileges, and you have enough disk space to copy the mailbox.” Then I would get only one email downloading over and over – in one instance, 121 times.
I have three Gmail accounts, and only one account was affected. Online support suggested, Not enough disk space or insufficient privileges. Corrupted folders. Antivirus. The easiest to check was the Antivirus, in my case, Avast.
So I disabled it temporarily. Right-click on the icon in the system tray (down by the clock), click on “Avast shields control” and then “Disable for 10 minutes”. Then I right-clicked on the account in question in Thunderbird, clicked on “Get messages”, and it worked.
I couldn’t find any controls in Avast for email scanning, there is an “Email Guardian” component but is only available to premium users. So what I have to do is to exclude this folder from being scanned by Avast.
Open Avast. Click on the Menu option (top right-hand corner) and then click on “Settings”.
Then down the left-hand side click on “Exceptions”.
Then click on the green “Add Exception” button.
Just click on “Next” on the following screens till you get to the “I Understand Risks” button. Click on it.
Now in the “Add exception” box, click on “Browse”.
In my case, I had to navigate to: C:\Users\Terry\AppData\Roaming\Thunderbird\Profiles\t0g983m6.default\Mail\pop.gmail.com
I have three Gmail accounts. I assumed the first one was the one I was looking for and put a checkmark in the box, then clicked on OK.
Back to the “Add exception” box. Click on the green ”Add exception” button.
Then I went back to Thunderbird and again clicked on “get messages” for that account and no error message. One more test. Restart Thunderbird. When it opened, no error message, and my emails were downloading properly again.
So, until something else updates and screws something else up…