If Thunderbird returns the following error while syncing IMAP folders on a dovecot server, although you subscribed to the folders:

[box type=”info”] Error in IMAP command UID FETCH: Invalid uidset

This is most likely caused by using a “>” character in front of the folder’s name

Example:

>FAMILY

It can be fixed by renaming the imap folder on the server, without the special character:

FAMILY

 

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