I think the sender is a scammer, but I'm not about to try opening the message to find out. There doesn't appear to be anyway to mark the PM as spam or report it or delete it without opening it, though.
This feature needs to be added. We shouldn't have to risk damage to our computers by the possible injection of malware just by looking at a message.
This is what it looks like. This user is new, hasn't posted anywhere, and their user name is, shall we say, not reassuring. The preview of the message isn't, either.
Meantime, how do I report the user and get this message deleted out of my mailbox without deleting ALL of them?