Just tried it, it seems to only work one-way and tags behave like regular folders. So Mailmate shows your web-created tags as folders, but if you apply an exist

Just tried it, it seems to only work one-way and tags behave like regular folders. So Mailmate shows your web-created tags as folders, but if you apply an existing tag in Mailmate nothing happens in the web version. Edit: found that discussion on JMAP support in Mailmate: https://lists.freron.com/mailmate/2019-January/010799.html https://lists.freron.com/mailmate/2019-January/010799.html