after installing iRedMail my nginx 404 error

i tried to install iRedMail and now all my domains are down. I didnt touch any blocks configuration files. i follow this tutorial https://www.digitalocean.com/community/tutorials/how-to-install-iredmail-on-ubuntu-12-04-x64

the issue is i dont have /var/www/html folder at all. why its looking for “html” folder ? thanks

my error log

2015/02/20 11:57:59 [error] 2549#0: *3 open() "/var/www/html/html/phpmyadmin" failed (2: No such file or directory), client: 86.47.32.32, server: _, request: "GET /html/phpmyadmin HTTP/1.1", host: "95.85.39.84"
2015/02/20 12:02:15 [error] 2549#0: *4 "/var/www/html/index.php" is not found (2: No such file or directory), client: 86.47.32.32, server: _, request: "GET / HTTP/1.1", host: "qbfweb.com"
2015/02/20 12:03:27 [error] 2549#0: *5 "/var/www/html/index.php" is not found (2: No such file or directory), client: 86.47.32.32, server: _, request: "GET / HTTP/1.1", host: "qbfweb.com"
2015/02/20 12:07:37 [error] 2549#0: *6 "/var/www/html/index.php" is not found (2: No such file or directory), client: 86.47.32.32, server: _, request: "GET / HTTP/1.1", host: "qbfweb.com"
2015/02/20 12:09:33 [error] 2549#0: *7 "/var/www/html/index.php" is not found (2: No such file or directory), client: 86.47.32.32, server: _, request: "GET / HTTP/1.1", host: "qbfweb.com"
2015/02/20 12:10:10 [error] 2739#0: *1 "/var/www/html/index.php" is not found (2: No such file or directory), client: 86.47.32.32, server: _, request: "GET / HTTP/1.1", host: "qbfweb.com"
2015/02/20 12:10:42 [error] 2739#0: *2 "/var/www/html/index.php" is not found (2: No such file or directory), client: 180.76.4.18, server: _, request: "GET / HTTP/1.1", host: "95.85.39.84"
2015/02/20 12:11:10 [error] 2739#0: *1 "/var/www/html/index.php" is not found (2: No such file or directory), client: 86.47.32.32, server: _, request: "GET / HTTP/1.1", host: "qbfweb.com"
2015/02/20 12:18:34 [error] 2819#0: *3 "/var/www/html/index.php" is not found (2: No such file or directory), client: 86.47.32.32, server: _, request: "GET / HTTP/1.1", host: "qbfweb.com"
2015/02/20 12:23:05 [error] 2898#0: *1 "/var/www/html/index.php" is not found (2: No such file or directory), client: 86.47.32.32, server: _, request: "GET / HTTP/1.1", host: "richmondgardens.ie"

here is my configuration block file :

server {
        listen   80;


        root /var/www/richmondgardens.ie;
        index index.php index.html index.htm;

        server_name richmondgardens.ie;

        location / {
                try_files $uri $uri/ /index.php?q=uri$args;
        }

        error_page 404 /404.html;

        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
              root /usr/share/nginx/www;
        }

        # pass the PHP scripts to FastCGI server listening on the php-fpm socket
        location ~ \.php$ {
                try_files $uri =404;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                include fastcgi_params;

        }

}

i dont understand everything was working fine till now. I dont think installation of mail server can broke something.