Enable digital signature to SharePoint outgoing emails.
My idea is to enable digital signature on SharePoint Out Of The Box outgoing emails such as alerts, tasks, etc. for on-premise SharePoint. This is important for corporates because of the number of phishing emails sent to the corporate users. Digitally signing the emails sent to Corporate users by SharePoint increases the security, authenticity and reliability of the out going email. I suggest to have this functionality and an option in SharePoint Central Administration.