I wish to get a certificate to use with Postfix running on CentOS 6. The server does NOT have any kind of web server installed. I do have a web server, but it is running on a different computer.
My domain is: mail.campercaver.net
It produced this output:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator standalone, Installer None
Would you be willing to share your email address with the Electronic Frontier
Foundation, a founding partner of the Let’s Encrypt project and the non-profit
organization that develops Certbot? We’d like to send you email about our work
encrypting the web, EFF news, campaigns, and ways to support digital freedom.
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for mail.campercaver.net
Waiting for verification…
Cleaning up challenges
Failed authorization procedure. mail.campercaver.net (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://mail.campercaver.net/.well-known/acme-challenge/tMubc-SciPLqQlDgv5-I3vzhohMHWVQRhh4AoHYwmGw: "
The following errors were reported by the server:
Domain: mail.campercaver.net404 Not Found
Detail: Invalid response from
To fix these errors, please make sure that your domain name was
entered correctly and the DNS A/AAAA record(s) for that domain
contain(s) the right IP address.
Your account credentials have been saved in your Certbot
configuration directory at /etc/letsencrypt. You should make a
secure backup of this folder now. This configuration directory will
also contain certificates and private keys obtained by Certbot so
making regular backups of this folder is ideal.
My web server is (include version): None. Not applicable, this is for Postfix
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): Yes
I’m using a control panel to manage my site (no, or provide the name and version of the control panel): No