I’ve had a request for the ability to add tags to topics when posting by email. This could work by adding a line as follows starting with
tags: and then a comma separated list.
tags: tag1, tag2, tag3
I can see potential for difficulty, e.g. because there is no autocomplete people won’t know tags that are already being used and create duplicates, but I also think it can be quite powerful and help people to indicate organization they’d like without having to log in - and in my community many people just want to stay in their email.