Hey Jacco,
Thanks for reaching out to us!
Unfortunately there isn’t a way to handle this by default within the plugin settings.
I’m limited in the support I’m able to provide here but I did want to give a little bit more information about a direction that I might pursue for something like this.
If you take a look at the Email template within the Event Tickets Plus > src > Tribe > Commerce > WooCommerce > Email.php file, you can see that there is a conditional at the very top to see if the “Tribe__Tickets_Plus__WooCommerce__Email” class already exists. This means that you can create the class of the same name within your theme and it will supersede this one. From there you can copy this one and modify the “trigger” function to include the items in the order. You could then stop the send if specific items are in the order.
I’m sorry I wasn’t able to give you a direct response here but hopefully it helps to get you pointed in the right direction.
Thanks!