This is the sneaky one you need to watch out for:
Method #2: Unsubscribe Links
On the topic of mailing lists, here’s another method that spammers sometimes use–and it’s a tricky one. If you’ve ever been subscribed to a newsletter or mailing list, you should know that at the bottom of every email they usually have an unsubscribe link.
Now, for most legitimate businesses, this unsubscribe link will do exactly what it’s supposed to do. If you’re receiving a newsletter from somewhere and it’s a newsletter that you purposely signed up for, then there shouldn’t be any problem with unsubscribing later.
But sometimes you’ll get spam email that poses as a newsletter and presents you with an unsubscribe option. In this case, that link could very well be deceptive.
Spammers send out these kind of emails en masse to randomly generated email addresses. By clicking on the unsubscribe link, you could actually be confirming the validity of your email addresses. This tells the spammer that your email address should be targeted with spam later.
