Delete without opening the message: Opening the spam message can send a signal to the spammer that someone has looked at the on-screen message and therefore that the email address is valid-which means you’ll probably get more spams in the future.
If you don’t recognize the name on your inbox directory or the topic on the inbox subject line, simply delete the message without reading it. Or you can use preview feature in your email program to look at the message without opening it; then delete it.