[SOLVED] Let's Encrypt not working?

Hello,

Just installed a fresh Debian 8.6 server with ISPConfig using the documentation provided by ISPConfig.
According to the documentation the Let's Encrypt SSL certs should be created automatically when you enable the checkbox "Let's Encrypt SSL", but when I save the website and go back into the website config again, the checkbox is disabled again and the site is not using any cert, getting this error:

An error occurred during a connection to webmail4.pro-shells.eu. SSL received a record that exceeded the maximum permissible length. Error code: SSL_ERROR_RX_RECORD_TOO_LONG

What could be the problem?

 

Hello Till,

Only thing I see in the letsencrypt log is this:

root@mailserver02:/var/log/letsencrypt# tail letsencrypt.log
File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/main.py", line 776, in main
return config.func(config, plugins)
File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/main.py", line 558, in obtain_cert
le_client = _init_le_client(config, auth, installer)
File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/main.py", line 368, in _init_le_client
acc, acme = _determine_account(config)
File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/main.py", line 359, in _determine_account
"Unable to register an account with ACME server")
Error: Unable to register an account with ACME server

 

I now see this error in the letsencrypt log:

Error: The ACME server believes [email protected] is an invalid email address. Please ensure it is a valid email and attempt registration again.

 

Hello Jesse,

I don't know why but I tried it a few times and suddenly it got accepted and the SSL cert was created.
I'll see what happens when the cert needs a renewal, when it's needed I'll create an MX record for that subdomain.