yea but if you dont have a list of emails already subscribed to you your just spamming
Of course, that is why you need to target your audience and create some free material, like an e-book which they will find valuable. If it solves some of their problems and answers some of their questions, people will be happy to put in their email address in order to get the e-book. If your content helped them, they will not ever see your email in their inbox as a spam. On the contrary, they would be prepared to pay next time for another piece of some valuable information you offer in your email.