Limiting DNS lookups is important for several reasons:
Email Deliverability: Too many DNS lookups can slow down the authentication process, leading to timeouts or failures, which can cause emails to be marked as spam or rejected. Performance Efficiency: Reducing the number of DNS lookups speeds up the email sending process, ensuring timely delivery. Security: Minimizing DNS lookups reduces the risk of DNS spoofing or cache poisoning attacks, enhancing the security of your email marketing.