Here are some strategies to limit DNS lookups in email marketing:
Optimize SPF Records: Use the minimum number of include mechanisms and avoid unnecessary redirections. Consolidate IP ranges where possible. DKIM Setup: Ensure your DKIM records are correctly set up to avoid additional lookups and ensure authenticity. Consolidate Domains: Use fewer sending domains and subdomains to reduce the need for multiple lookups. Monitor DNS Records: Regularly audit and clean your DNS records to remove outdated or unnecessary entries.