March 13, 2019: End-of-Life for All TLS-SNI-01 Validation Support


Sorry, I got an E-Mail: Action required: Let’s Encrypt certificate renewals

I have no clue what to do, please help. :frowning:



What of the e-mail don’t you understand? Could you please copy/paste the content and tell us per line if it makes any sense to you or not.

Also, please answer the questions you deleted when you started this thread the best you can:

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g., so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:

I ran this command:

It produced this output:

My web server is (include version):

The operating system my web server runs on is (include version):

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don’t know):

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot):


Thanks for your E-Mail.

The E-Mail I got from letsencrypt has the following content (see below):

I have a NAS from synology, two websites: and and my hosting provider is bluehost. I have updated my synology Diskstation today, everything is up to date now. I have not run any command nor did I get some output. I do not know how to update the ACME client or to use an alternative validation method…I also do not know how I can test my system as you mention in the E-Mail.

Thanks for your support.


And your sites run on your Synology NAS?


No I use bluehost and wordpress.

I don‘t know what ACME is and TLS-SNI-01…


How did you get and install your certificate in the first place?

closed #7

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