Thunderbird 115.4.1 on Win 10 - Unable to write the email to the mailbox.
Hello. Currently receiving the following error pop-up with Thunderbird 115.4.1 on Win 10 22H2:
"Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox."
This occurs when fetching new email from an sbcglobal.net POP3 account. Settings: inbound.att.net, port: 995, SSL/TLS, OAuth2. These settings have worked successfully for years until yesterday NOV 6 2023.
I have several other POP3 accounts all using the same settings shown above but none of them are triggering the pop-up error.
Can an expert please advise the specific conditions that trigger this error so I can determine where the fault lies? Example: Is this Thunderbird's interpretation of an error condition being transmitted by the email server requiring interaction with service provider? Is this Thunderbird's response to an internal problem like not enough disk space? (even though there is plenty)
A solution would be nice, but an explanation re: the triggering mechanism is absolutely required. Thanks.
Все ответы (4)
Several reasons - please read: https://kb.mozillazine.org/Unable_to_write_the_email_to_the_mailbox
If compacting has not helped: Log on to webmail account via abrowser and see if the oldest email not downloaded has something unusual about it eg: Subject is very long. If necessary move to another folder or delete Empty the Spam folder and then in Thunderbird retry to 'Get Messages'.
Another possibility: You are using a Pop account which downloads emails to 'Inbox'. Something could be corrupted so please try this: In Thunderbird
- Help > Troubleshooting Information
- Under 'Application Basics' half way - Profile Folders - click on 'Open Folder'
A new window opens showing you the contents of your 'profile name' folder.
- Exit Thunderbird now
- Click on 'Mail' folder to see contents
- click on the relevant sbcglobal.net pop account name folder to see contents.
- Rename the 'Inbox' mbox file (it has no extension) as 'OldInbox'
- Delete the 'Inbox.msf' file
Start Thunderbird It should create a new empty Inbox mbox file to receive emails. You should still see all your previosuly downloaded emails in 'OldInbox' folder.
I do not know how you organize emails, but I would advise you create folders for emails you wish to store. eg: Family, Friends, Online Orders, Bills, etc Do not use the 'Inbox' as your main or only storage folder, it is an Inbox for incoming not sorted stuff. Otherwise you will have one single text document - the 'Inbox' mbox text file which contains all your emails and this is very risky. If it gets too big you will discover it may be difficult to compact. It would also get difficult to open should you ever need access to it in order to rescue emails.
Изменено Toad-Hall
SOLUTION: Created temporary folder using sbcglobal webmail then moved all but 3 unread inbox messages to it. This stopped the server from sending the error message that triggered the somewhat cryptic Thunderbird error pop-up, and the 3 unread messages downloaded successfully.
sbcglobal/att must have clamped down on some kind of inbox size parameter because there were only 57 messages on the server and most had a filesize of 30kb or less. None were over 87kb. I've frequently had over 150 messages without triggering this error.
This issue is closed.
Изменено italiangm
I disabled my antivirus (AVG) and it now works. Just need to figure out how to get it to work with my AV enabled since I do not want to leave it disabled.
carriemeurer said
I disabled my antivirus (AVG) and it now works. Just need to figure out how to get it to work with my AV enabled since I do not want to leave it disabled.
Add the TB profile folder as an exclusion:
https://support.avg.com/SupportArticleView?l=en&urlname=avg-antivirus-scan-exclusions
You might also need to disable SSL scanning.
Neither of these disables the real-time background scanning, which is sufficient for email.
I would recommend removing AVG and using the built-in Windows/MS Security.