@PitaJ said in Error: unable to verify the first certificate. How to fix?: You may be able to fix this by changing your email server setup to provide a different certificate, one which embeds the full chain. (Probably fullchain.pem) Since postfix was working for every other site on the server, I never thought to try that. But I did and it worked! Thank you very much.

@01 What is the error you are receiving when you visit your site? If you can access your site, but it says the connection is insecure, then part of your certificate chain is missing or invalid.

I don't know if you guys are aware, but StartSSL offers free level 1 SSL certificates. I use apache2 as proxy and it is very easy to setup. Their site is: https://startssl.com/ For generating private key and CSR: https://help.ubuntu.com/lts/serverguide/certificates-and-security.html