In the real world, breaking into someone's house is illegal, and we all know that.
The same rule applies in the email marketing world. Therefore, sending mass emails to users' inboxes, especially without permission, is a terrible idea - and poor practice, too.
However, there's a way to make sure that you are on the right side of anti-spam laws. Have you ever heard of permission-based email marketing?
If not yet, let's explore in this blog post!