Here are some common methods to obtain authorization:
Opt-In Forms: These are forms where users voluntarily enter their email addresses to receive communications from you. Ensure that these forms are clear about what type of content the user will receive. Double Opt-In: After the initial sign-up, send a confirmation email requiring the user to click a link to confirm their subscription. This double opt-in process ensures that the email address is valid and that the recipient genuinely wants to receive your emails. Preference Centers: Allow subscribers to select the types of emails they want to receive. This not only secures authorization but also tailors the content to their interests.