If you mean the category name, then that’s already possible.
We use the following value for our site setting email subject:
%{optional_re}%{optional_pm}%{optional_cat}%{topic_title}
More:
If you mean the category name, then that’s already possible.
We use the following value for our site setting email subject:
%{optional_re}%{optional_pm}%{optional_cat}%{topic_title}
More: