Several techniques can be employed to prevent spam entries, including:
Double opt-in: Requiring recipients to confirm their subscription through a verification email. Email authentication: Implementing SPF, DKIM, and DMARC to verify the sender's identity. Using spam filters: Employing advanced algorithms and AI to detect and block spam messages. Maintaining a clean email list: Regularly updating and removing inactive or invalid email addresses. Providing an easy opt-out option: Allowing recipients to unsubscribe easily to reduce spam complaints.