Are these recently created folders or have they been working with filters for some time?

Are you able to access eg: "Inbox/Nick/COMMERCIAL/AAA" and select an email to open and read?

Suggest you check all folders really are subscribed. right click on mail account name in Folder pane and select 'Subscribe'. click on 'Refresh' button. Select all folders (highlight) click on 'Subscribe' button. click on 'OK'

Folders have been in place & working for many months. Errors are recent.

I can access all emails within all folders.

Took all actions regarding 'Subscribe'. No Joy, errors still occur

right click on Inbox and select 'Properties' General tab What does it say for size on disk ? select 'Quota' tab. What is the quota limit status % on that mail account Inbox folder?

Hi.

Size on disk = 101MB. Quota tab displays "Quota information is not available because the folder is not open"

Last entry from filter log: [9/29/2018 5:13:42 PM] Applied filter "Nick: Amazon" to message from "Amazon.com" <store-news@amazon.com> - Most Read from The Washington Post at 3/1/2018 8:02:38 AM moved message id = 01000161e1a84a48-5369d2d6-3002-4c74-b924-9bb99d341141-000000@email.amazonses.com to imap://njparker%40verizon.net@imap.aol.com/INBOX/Nick/COMMERCIAL/Amazon

However the email is not moved to the target folder. Same error.

Nick

re :Quota information is not available because the folder is not open"

Try this:

• Right click on mail account in folder pane and select 'Settings'
• Select 'Server Settings'
• click on 'Advanced' button

• 'Imap server directory' type: Inbox
• select 'Show only subscribed folders'
• select 'Server supports folders that contain sub-folders and messages'
• click on 'OK'

• click on 'OK'

Hi. I performed the above on my laptop running Linux Ubuntu 18.04.1 LTS. Thunderbird version is 52.9.1 (64-bit). The result is that after making the changes and restarting Thunderbird, ALL my sub-folders under Inbox DISAPPEARED. When I backed out those changes, & restarted, the folders all returned but are now EMPTY.

On my Windows 10 laptop, the folders still contain emails

Filters are still not working on either laptop.

Nick

Two things. Is the profile located on a local disk? All bets are off if it is at the end of a congested USB chain or hanging out in the cloud.

Try executing the filter "after classification" this delays the actual execution a few miliseconds while classification occurs and can help with timing issues.

Most importantly, do you have some sort of anti virus program that may be locking the inbox file or the global index files, or a streaming backup (think cloud backup or NAS backup, they are rare on local disks to a local machine)

Matt

Yes, profiles on both laptops are local.

Filters are already being applied after classification.

Win10 laptop has Norton Security, but Ubuntu laptop has no AV running.

No streaming backup happening at all.

Nick

as an experiment.

copy a mail to one of the folder manually.

then repeat the copy using a filter.

What result? If successful repeat with a move instead of a copy.

Manual copy works. Filter still fails. I created a new folder and filter; that works. So it's all my existing folders & rules that fail, but new ones work.

Thanks

does the manual move work?

Some IMAP mail server do not support move. That is why I initially asked and if your like me you have no idea what m,ail software you provider is using at any given time.

For servers that do not support move, Thunderbird has traditionally copied and then deleted under the hood when you select move.

Matt

I ended up deleting & recreating all my folders & re-applying the rules, a tedious & laborious process. Everything's working again. You can close out any tickets you may have on this issue.

Thanks for your help.

Nick

When this happened I solved it by selecting the (imap) account in question, right clicking on it, selecting "Properties", then clicking on "Repair Folder". (I was going to try deleting all the .msf files but now don't need to.)