DNSSEC is useful for SMTP SSL encryption (at least from you to your server).<p><a href="https:&#x2F;&#x2F;blog.filippo.io&#x2F;the-sad-state-of-smtp-encryption&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blog.filippo.io&#x2F;the-sad-state-of-smtp-encryption&#x2F;</a>