[Rspamd] Handle Postmaster in and outbound as trusted

data/web/inc/presets/rspamd/preset_2.yml

@@ -1,10 +0,0 @@
-headline: lang.rsettings_preset_2
-content: |
-  priority = 10;
-  rcpt = "/postmaster@.*/";
-  apply {
-    symbols_enabled = ["DKIM_SIGNED", "HISTORY_SAVE", "MILTER_HEADERS", "ARC_SIGNED"];
-  actions {
-      greylist = null;
-    }
-  }