: Monitor Custom Ports with Cert Spotter
Cert Spotter can now monitor certificate installation on any combination of port numbers, including SMTP ports that use STARTTLS. (Support for more STARTTLS protocols is planned.)
Custom port monitoring is available on the Startup plan and higher. To set up, visit your Cert Spotter settings and click the "Settings" link next to the domain whose ports you want to customize. By default, it will affect sub-domains too. If you want to set a custom port for just a sub-domain, you can add the sub-domain to your watch list (uncheck the "also monitor sub-domains" box) and then click the "Settings" link for the sub-domain; the port settings will override the domain-wide settings.