I havent used gmail in a while. By tags do you mean that you can add one or more custom tags to emails that you can then use to filter by? If so, yes Thunderbird does support that, but i assume its locally stored information. You can sync your thunderbird profile across devices tho.
grue@lemmy.world 4 days ago
Yes, like sorting mails into folders except they can be in more than one at a time. It’d be nice if IMAP were updated to support that sort of thing sync’d on the server.