There are several ways to obtain owner's consent, including:
Double Opt-In: This method involves sending a confirmation email to the recipient after they sign up, requiring them to click a link to confirm their subscription. Single Opt-In: In this method, the recipient is added to the email list immediately after they sign up, without any additional confirmation. Subscription Forms: These are forms embedded on websites or landing pages where users can enter their email addresses to subscribe to newsletters or updates.