How can I move my mails from a no longer existing email provider?
I followed the steps described here: https://support.mozilla.org/en-US/questions/1234473 I get a popup with the following contents: "Alert
While working offline, you cannot move or copy messages that were not downloaded for offline use. From the Mail window, open the File menu, choose Offline, then uncheck Work Offline, and then try again"
I checked the imap folders, and everything seems to be downloaded correctly (I can access the mails from the app, read all of them, even the email account does not exist for years now)
How should I proceed?
Chosen solution
re :I checked the imap folders, and everything seems to be downloaded I notice you say : even the email account does not exist for years now Are you saying you still have the imap account, but it does not exist any longer so the imap account is not accessing any server?
Sounds like it is trying to check to synchronise and it is failing as imap account cannot access server.
In Thunderbird 'Help' > 'Troubleshooting Information' Under 'Application Basics' section Look for 'Profile Folder'...Click on 'Open Folder' Click on 'ImapMail' folder to open click on the imap mail account name folder to see contents.
Files with .msf extension are index files, if you only see those files then you have not fully downloaded copies of emails. Folders with .sbd extension mean you have subfolders, you can check those folders to see if they contain mbox files. If you have fully downloaded copies of emails then they will be in mbox files. mbox files do not have any extension. They will have same name as folders you see in Folder Pane.
If yes all looks good.
Exit Thunderbird now.
Copy the mbox files and paste them into the 'Mail'/'Local Folders' folder.
See image as example of copying mbox files from an imap account into Local Folders.
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Chosen Solution
re :I checked the imap folders, and everything seems to be downloaded I notice you say : even the email account does not exist for years now Are you saying you still have the imap account, but it does not exist any longer so the imap account is not accessing any server?
Sounds like it is trying to check to synchronise and it is failing as imap account cannot access server.
In Thunderbird 'Help' > 'Troubleshooting Information' Under 'Application Basics' section Look for 'Profile Folder'...Click on 'Open Folder' Click on 'ImapMail' folder to open click on the imap mail account name folder to see contents.
Files with .msf extension are index files, if you only see those files then you have not fully downloaded copies of emails. Folders with .sbd extension mean you have subfolders, you can check those folders to see if they contain mbox files. If you have fully downloaded copies of emails then they will be in mbox files. mbox files do not have any extension. They will have same name as folders you see in Folder Pane.
If yes all looks good.
Exit Thunderbird now.
Copy the mbox files and paste them into the 'Mail'/'Local Folders' folder.
See image as example of copying mbox files from an imap account into Local Folders.
Thanks!