I have a couple of IMAP accounts that are no longer active, but I still need to access some of these old messages. I know that I can create a subfolder under "Local Folder" and then individually move each message to the subfolder, but each account has 20K+ message so this is not realistic. Is a there a more sensible way to do this? For instance, currently these IMAP files seems to be stored in:
.thunderbird/something.default/ImapMail/(name of account)
and that the local subfolders I created seem to be in:
.thunderbird/something.default/Mail/Local_Folders/(name of subfolder)
Can I simply mv the IMAP folders to the local folder directories? Is there anything/folder/dot-files etc that I need to move/modify? These old messages are important so I can't afford to mess up.
In case this matter: I need to keep the two old IMAP accounts separate.
I do need to need these two IMAP accounts.
/home/USER
folder. For example, using the default Backup app. You can also make a zip file of the folder where Thunderbird keeps your IMAP emails and keep them in an external drive.