This is super old, but wondering if there had been any change so that a suitably crafted email could be used to track a topic.
Our use case is there are some users who despite much cajoling, explaining and telling just cannot seem to watch important topics that we use as de-factor mailing lists.
It would be great to have a simple mailto link that they could click to subscribe to a topic. Note that they don’t currently get sent emails from that topic, so can’t reply to it.