I received the email discussing the ACME TLS-SNI-01 domain validation issue. But it doesnt show what domains it applies to. I’ve checked them all, I am running certbot versions 23+ on Ubuntu 18.04.1 and one 16.04.5 LTS. Running the dry run all the challenges show using HTTP-01 Please fill out the …

Action required: Let's Encrypt certificate renewals, What Domains?

JuergenAuer January 18, 2019, 4:10pm 6

Check if there is a standalone - authenticator (perhaps a problem) or tls-sni as validation method.

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