I was going to reply "no", but I checked the settings just now and it appears it does! This is from the settings: Labels ====== Organize messages

I was going to reply "no", but I checked the settings just now and it appears it does! This is from the settings: Labels ====== Organize messages with: [ ] Folders: file each message into a single folder [ ] Labels: add multiple labels to each message Switch methods at any time. Folders will become labels and vice versa. I don't use labels, so I don't know if it's the same as how Gmail does it. But multiple labels per message is a thing it looks like.