&gt; % openssl s_client -connect pear.php.net:443 ... Certificate chain 0 s:&#x2F;CN=mail.cweiske.de<p>&gt;So you&#x27;re using CN=mail.cweiske.de for pear.php.net. I don&#x27;t even know what to say.. Well, happy hacking!<p>Yeah, but it&#x27;s cool that they used Let&#x27;s Encrypt.