Yes, it would take a long time to spread considering there&#x27;s a whopping 388 domains out there using DNSSSEC for SMTP, the majority of them run by neckbeards and not commerical email services.<p><pre><code>    388 	Zones have deployed TLSA for SMTP with STARTTLS (Port 587)
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I don&#x27;t expect this to catch on, ever.<p><a href="http:&#x2F;&#x2F;secspider.verisignlabs.com&#x2F;stats.html" rel="nofollow">http:&#x2F;&#x2F;secspider.verisignlabs.com&#x2F;stats.html</a>