I have started to use the latest iteration of Mail Tags on a trial basis as a means of taming, particularly, email. I used to use it and tags displayed in DTPO.
For reasons unknown, at present, Tags are not displaying in DTPO. I have checked Preference settings in both programs, including whether it is a restriction on trial versions of Mail Tags but that does not appear to be the case. Tags are displaying in the emails as received or sent prior to import to DTPO.