can you post your nginx config?
I use nginx as front server without any problem

https.my.host.com.conf


server {
    listen       443;
    server_name  my.host.com;

    ssl                  on;
    ssl_certificate      my.host.com.crt;
    ssl_certificate_key  my.host.com.key;
    ssl_dhparam /etc/nginx/certs/dhparam.pem;

#    ssl_session_timeout  5m;
    keepalive_timeout 360;

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_session_cache  builtin:1000  shared:SSL:10m;
    ssl_ciphers HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4;
    ssl_prefer_server_ciphers   on;

    access_log            /var/log/nginx/https.my.host.com.access.log;

    location / {

      proxy_set_header        Host $host;
      proxy_set_header        X-Real-IP $remote_addr;
      proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header        X-Forwarded-Proto $scheme;

      # Fix the It appears that your reverse proxy set up is broken" error.
      proxy_pass          http://my.host.com/;
      proxy_read_timeout  180;

    }
  }

We are using nginx 1.0.15 running on CentOS6.

proxy_pass          http://my.host.com/; - remove last slash.

I dont see override settings in nginx configuration.

Do you have this on domino?

Next, 1.0.5 is so old. One more,  proxy_redirect     off; - set this if you dont want to be proxy for all

My example:

in nginx.conf - client_max_body_size 0;

in vhost:

    location / {
        proxy_pass http://traveler;
        ### Set headers ####
        proxy_set_header        Accept-Encoding   "";
        proxy_set_header        Host            $host;
        proxy_set_header        X-Real-IP       $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        ### Most PHP, Python, Rails, Java App can use this header ###
        #proxy_set_header X-Forwarded-Proto https;##
        #This is better##
        proxy_set_header        X-Forwarded-Proto $scheme;
        add_header              Front-End-Https   on;
        ## By default we don't want to redirect it ####
        proxy_redirect     off; - Disable proxy for all!
        proxy_connect_timeout 120;
        proxy_send_timeout 120;
        proxy_read_timeout 180;
        proxy_set_header "User-Agent" $ua; - This is for outlook
    }

P.S. If you want use outlook you need setting some tricks. Of course this is not official support) But some clients want outlook.