In the specific case of “posting in a closed/archived topic”, this theme component can do the job. It should be possible to extend this to posting in specific categories and non-participating PMs, if you have someone to do the development work.
In the specific case of “posting in a closed/archived topic”, this theme component can do the job. It should be possible to extend this to posting in specific categories and non-participating PMs, if you have someone to do the development work.