diff --git a/conf/nginx.conf b/conf/nginx.conf
index 61fa009..b033ab0 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -39,5 +39,11 @@ server {
 		client_max_body_size 20M;
 	}
 
+	# Webfinger configuration.
+	location = /.well-known/webfinger {
+		include fastcgi_params;
+		fastcgi_param SCRIPT_FILENAME /usr/bin/mailinabox-webfinger.php;
+		fastcgi_pass unix:/tmp/php-fastcgi.www-data.sock;
+	}
 }
 
diff --git a/setup/web.sh b/setup/web.sh
index 8a2df8d..53f70d0 100755
--- a/setup/web.sh
+++ b/setup/web.sh
@@ -31,6 +31,10 @@ rm -f /etc/init.d/php-fastcgi
 ln -s $(pwd)/conf/phpfcgi-initscript /etc/init.d/php-fastcgi
 update-rc.d php-fastcgi defaults
 
+# Put our webfinger server script into a well-known location.
+cp tools/webfinger.php /usr/bin/mailinabox-webfinger.php
+chown www-data.www-data /usr/bin/mailinabox-webfinger.php
+
 # Start services.
 service nginx restart
 service php-fastcgi restart
diff --git a/tools/webfinger.php b/tools/webfinger.php
new file mode 100755
index 0000000..2192e08
--- /dev/null
+++ b/tools/webfinger.php
@@ -0,0 +1,9 @@
+<?php
+	$resource = $_GET['resource'];
+
+	header("Content-type: application/json");
+	echo json_encode(array(
+		subject => $resource,
+	), JSON_PRETTY_PRINT);
+?>
+