🚀 Feature: Confirmation mails after share send/downloaded

[GitNees]

🔖 Feature description

*A confirmation-mail to the user that send a share by mail, so you atleast know a mail was send out.
*A confirmation-mail when the receiver has click the URL, so it flags it as downloaded.

🎤 Pitch

Currently when you send a share by mail, you never know if the mail was send, a basic mail with
"Confirmation a share was just send to email with sharename + full URL

Having this mail can also be handy when a client said they didnt receive anything to quickly forward that mail with the details.