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I am facing an old-fashioned setup, where emails are fetched (and deleted) using POP3 from several accounts, and stored in Thunderbird's "local folders", organized in folders and subfolders.
The project is to move all that mess into a single Gmail account, so that everything can be accessed at a single, remote location using IMAP.
Would the migration be as easy as just, in Thunderbird, copying the emails from the local folders to the remote IMAP account, or are there caveats to consider? Would some information be lost/altered in the process?
1I just drag and drop between local folders, IMAP folders, and Gmail folders in Thunderbird. It seems to work fine. – Tim – 2017-08-16T19:21:35.580
2I have had issues with creating folder trees in the past, but copying the messages works fine. If your folder structure is not too complicated, you might want to create the folders first, then copy the messages in blocks of ca. 1000 – Eugen Rieck – 2017-08-16T19:57:45.597