Service Desk - send notification on text log change

Hello,

I am trying to create an action in order to send an email to the incident processor when the reporter sends a reply, the one found in text log. I am not sure if those are also called messages.

I have found a condition in the SMIN_STD_MAIL_WATCHLIST, that is like this: &NEW_TEXT_FOUND = X and i have used it for my condition. I also selected the schedule automatically and the partner depedent checkbox (with value SLFN0004 - Message processor).

But it doesn't work, and I think it's because of that condition, &NEW_TEXT_FOUND = X. I couldn't find it in the expression builder, that's why I've copied it fromSMIN_STD_MAIL_WATCHLIST.

Is there any other expression that I can use when the text log changes?