> Because if you send emails to people who don't read them, eventually they will flag you as spam (even if they signed up for the emails in the first place), a

> Because if you send emails to people who don't read them, eventually they will flag you as spam (even if they signed up for the emails in the first place), and then you will start getting blocked as spam by Gmail. Probably because those email newsletters are spam sent to people who interacted with a form once.