What is permission-based email marketing?
Permission-based email marketing simply means that the email is sent to people who want it — in contrast to unsolicited email or spam. This definition is typically expanded to mean that every person that you send an email message to has given their permission, whether direct or implied, for you to do so.
Permission-based email marketing is sending emails to customers who have provided their contact information to get useful information from you. We call spam not only letters with such a mark, but also any information uninteresting and unwanted for recipients.
https://esputnik.com/en/email-marketing
Permission-based email marketing involves the use of double opt-in verification.
