proxy-nginx/mailu/overrides/location_fix.conf

# Usuń spacje i uprość wyrażenia regularne
location / {
    rewrite ^$ / permanent;
    rewrite ^/(.*)$ /$1 break;
    
    include /etc/nginx/proxy.conf;
    auth_request /internal/auth/user;
    error_page 403 = @sso_login;
    proxy_pass http://$webmail;
}