I have three trash folders in thunderbird on Linux for one outlook email. There is trash with a trash icon, where most everything goes, deleted items, a regular folder icon with a few emails all from the same day, and several emails titled "Retrieval using the IMAP4 protocol failed for the following message: 1123", and trash, also with a trash icon under local folders which has nothing. Then there are two sent folders. One has a post stamp icon and has most messages, the other has a regular folder icon and seems to have emails I sent from the outlook website. I would like to merge all of these.