hestiacp/install/deb/templates/mail/nginx/default.stpl

server {
	listen      %ip%:%proxy_ssl_port% ssl;
	server_name %domain_idn% %alias_idn%;
	root        /var/lib/roundcube;
	index       index.php index.html index.htm;
	access_log  /var/log/nginx/domains/%domain%.log combined;
	error_log   /var/log/nginx/domains/%domain%.error.log error;

	ssl_certificate     %ssl_pem%;
	ssl_certificate_key %ssl_key%;
	ssl_stapling        on;
	ssl_stapling_verify on;

	# TLS 1.3 0-RTT anti-replay
	if ($anti_replay = 307) { return 307 https://$host$request_uri; }
	if ($anti_replay = 425) { return 425; }

	location ~ /\.(?!well-known\/) {
		deny all;
		return 404;
	}

	location ~ ^/(README.md|config|temp|logs|bin|SQL|INSTALL|LICENSE|CHANGELOG|UPGRADING)$ {
		deny all;
		return 404;
	}

	location / {
		alias /var/lib/roundcube/;

		try_files $uri $uri/ =404;

		proxy_pass https://%ip%:%web_ssl_port%;

		location ~* ^.+\.(ogg|ogv|svg|svgz|swf|eot|otf|woff|woff2|mov|mp3|mp4|webm|flv|ttf|rss|atom|jpg|jpeg|gif|png|webp|ico|bmp|mid|midi|wav|rtf|css|js|jar)$ {
			expires 7d;
			fastcgi_hide_header "Set-Cookie";
		}
	}

	location @fallback {
		proxy_pass https://%ip%:%web_ssl_port%;
	}

	location /error/ {
		alias /var/www/document_errors/;
	}

	proxy_hide_header Upgrade;

	include %home%/%user%/conf/mail/%root_domain%/%proxy_system%.ssl.conf_*;
}