Have you ever been directed to a website from another website that claimed to have a free offer or something like that! If you are required to put an email address in, be aware that you just signed up for spam for life campaign!
Well, never actually happened with me, lucky me. But, yeah I do receive spoof mail, which redirects you to some fraud, similar to Paypal looking site and asks you to login in, but I'm clever enough to notice to fraudulent links.
I always look at the address bar, thanks for the reply though! That is usually a tell tale sign you are trying to be phished, or put on some sort of mailing list!
I barely signup for free offers because they are not actually giving you free things/services but in return they are selling your email addresses to the spammers.
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Website fraud! 
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