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: entered site

It produced this output: error message relating to security certificate

My web server is (include version): Mammoth VPS gp.small

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): 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):

Looks to me like “” is currently using a valid certificate issued by Let’s Encrypt on 09 JUN 2019, valid until 07 SEP 2019.

So things appear to be in working order. Could you please copy-paste or screenshot the specific error you encounter?

1 Like

Thanks Ezekiel. I greatly appreciate your reply.

Here is the euro message I get in Firefox:

At present my site is not secure, and because my emails are directed through my domain, I am out of contact that way.
One view I have heard is that I just need to wait for the certificate to take effect? It has nearly been 2 days so far so I am not sure about that.

Again, my thanks for your interest.


Here is what I get when I try to find details via my iPhone:

Here is more detail from Firefox:
Any thoughts would be gratefully received!!!
With thanks, Jeremy.

Hi @Joliver

checking your domain you see the problem ( ):

Domainname Http-Status redirect Sec. G 301 0.630 A 301 0.623 A 301 3.526 N
Certificate error: RemoteCertificateNameMismatch 200 6.086 I

Your non-www version works, your www not.

Your certificate has two domain names:
expires in 88 days, - 2 entries

So you should create one certificate with three domain names - add the www version.


Thanks a million Juergen!

Trouble is, I do not manage this – I have an IT guy who set this up and who is currently out of contact.

As the owner of the domain, are you able to tell me how I can login to the Let’s Encrypt system and make this alteration?

These are the questions in the standard template (your topic). Do you have root access?

Which client did you used to create the current certificate?

1 Like

Hi Juergen. Thank you very much for your kind attention to my problem. Fortunately, in the last couple of hours, I have managed to track down my IT advisor who is in secondment somewhere deep in China. I have taken the comments you kindly posted – with which he entirely agrees – and he has managed to resolve the issue.

Please accept my sincere thanks. Very best, Jeremy.


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