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→Prerequisites: Port 443 needs to be open too
* www.example.com resolves to your SME Server--published DNS records give the external IP address of your SME Server when queried for www.example.com.
* www.example.com resolves to your SME Server--published DNS records give the external IP address of your SME Server when queried for www.example.com.
* Your SME Server is connected to the Internet.
* Your SME Server is connected to the Internet.
* Port 80 on your SME Server is open to the Internet--you aren't behind a firewall, or some ISP filtering, that would block it.
* Ports 80 and 443 on your SME Server are open to the Internet--you aren't behind a firewall, or some ISP filtering, that would block them.
Letsencrypt will issue certificates that include multiple hostnames (for example, www.example.com, example.com, and mail.example.com), all of which would be part of the request. All of the conditions above must be true for all of the hostnames you want to include in the certificate.
Letsencrypt will issue certificates that include multiple hostnames (for example, www.example.com, example.com, and mail.example.com), all of which would be part of the request. All of the conditions above must be true for all of the hostnames you want to include in the certificate.