If you want to send it to specific people and those people don’t change, you can simply enter their email addresses - they don’t need to be pulled from a placeholder (as I understand they are not in the change fields). You can also create a custom object with the emails, create a reader, and retrieve the emails from it.

Thank you!

Is the screenshot from Workflow Automator? The problem with workflow is that I can’t trigger the email the way we would like to. It seems I can’t create an event for the activity add/remove Change tickets in Release.

I haven’t looked into Custom Object, are there other possibilities to trigger email from there?

To be honest, in our company we do not use Releases at all - the screenshot I posted is from the Workflow Automator but for editing Changes. If a Release in your case is created automatically, for example after obtaining all approvals in a Change, you can link it with a trigger to send an email to specific people.
I’m currently reviewing workflows for Releases, and from what I can see, there’s no option to notify several specific people from different groups directly from the action level. However, you can do this via the API.
 

From what I’ve seen, there is a trigger that runs the action if a Release is created - if you only create them based on Changes, that will be sufficient as well. I’m not entirely sure, though, how you would need to set it the other way around, from Release to Change. You will probably need a workflow on the Change where you set a special condition that triggers only for those created from a Release.

Thank you for your answers!

Unfortunately it seems that what we won’t be able to do what we want to do. It’s the adding/removing existing changes to a existing Release we wan’t notifications for.