Here are some common methods to obtain explicit permission:
Sign-Up Forms: Use clear and concise sign-up forms where users can enter their email addresses and explicitly agree to receive emails. Double Opt-In: After the initial sign-up, send a confirmation email where the user must click a link to verify their subscription. This ensures that the email address is valid and that the user is genuinely interested. Subscription Checkboxes: Include a checkbox on your website or during the checkout process where users can opt-in to receive newsletters and updates. Make sure the checkbox is not pre-checked.