Deleting does not send anything anywhere and is the safest way to deal with the stuff.
Email systems can he set to request a delivery receipt and/or read receipt so reading or marking as read, are not a good idea. Following any embedded links or opening any attached documents are how the "payload" of malware gets delivered.
We're doing a cybersafe campaign at work right now with all these simple bits of advice yet still people fall for;
Email from IT SUPPORT to reset your password at this link.
Urgent payment for you.
Parcel held for you.
Overpaid tax refund.
The funny thing to me is that despite the precise details sbout the amounts of money or what's gone wrong, no one seems to notice the sender doesn't know their name!
Unless there are alot of people out there called Dear Customer.
