There's no email confirmation for our Mac app. It allows you to send link transfers, which don't come with email confirmations.
It's up to you to copy the download link, or select the option to automatically copy all links to your clipboard. Click on the app icon, and after that on the little cogwheel, to find your preferences:
This is where you'll find the option to "Auto copy link to clipboard". That will do exactly what it says on the tin - by making sure all your future uploads are copied automatically to your clipboard.
It is up to you to copy the link or keep track of it in any way that's suitable for you. It is also up to you to share it with whomever you like, since we don't send an email to you or the recipient.