I would say this is best done in the VSM. Consider a simple VSM.
I would add a Send Mail step after the VSI Selection.
You have more work to do after adding the step.
- Configure an EMail Connection asset
- Determine and apply content
- Figure out the From, To, Subject, Message content, etc.
This may require additional scripting. Be careful if you reference content on the file system. If referencing the file system, the referenced assets will need to be available on the VSE server's file system when the service is deployed.