I created a filter that based on a CC mail address put a Label on every match, favorited the mail and put it in a separate folder.
Great. Except that there were 1600 mails using that CC that were filtered which shouldn't have been matched. I made a mistake.
And now there's NO way to correct, except for manually opening each and every mail to unfavorite and remove the label, then place it in the folders they originated
Now juggling with temp folders and temp filters to try to get things right again. If I can filter out the mismatches, luckily these are discardable notifications that I can delete and no longer have a polluted labeling and favorites collection.
PS. Seeing that just moving 1600 mails to a temp folder takes minutes.. there must be some busy queue that request lands in? I gather the action itself shouldn't take that long to execute. Applying a mail filter takes much longer even.
Filter action just completed. I only needed to filter the 1600 msgs in one folder, but it only processes all messages. The filtering took nearly one hour. 🤯