Yes, you will receive a confirmation email for your vignette purchase.
Please note, this is not yet the vignette but just an order confirmation. Your vignette will be sent to you separately once the license plate has been added to the official Slovenian toll system.
Related articles:
I bought the Slovenian digital vignette but got no email, what now? (Vignetteslovenien.si)
Do I need a payment receipt or print-out of the Slovenian vignette?
Does the Slovenian vignette activate immediately?
Our contact information (Vignetteslovenia.si)