[Rspamd] Updated values of default ratelimit settings, add info_symbol

data/conf/rspamd/override.d/ratelimit.conf

@@ -1,11 +1,12 @@
 rates {
     # Format: "1 / 1h" or "20 / 1m" etc. - global ratelimits are disabled by default
-    to = "100 / 1s";
-    to_ip = "100 / 1s";
-    to_ip_from = "100 / 1s";
+    to = "45 / 1m";
+    to_ip = "360 / 1m";
+    to_ip_from = "180 / 1m";
     bounce_to = "100 / 1s";
     bounce_to_ip = "100 / 1s";
 }
 whitelisted_rcpts = "postmaster,mailer-daemon";
 max_rcpt = 5;
 custom_keywords = "/etc/rspamd/lua/ratelimit.lua";
+info_symbol = "RATELIMITED";