mailcow dockerized

data/conf/rspamd/local.d/dkim.conf

@@ -0,0 +1,19 @@
+sign_condition =<<EOD
+return function(task)
+        local from = task:get_from('smtp')
+        if from and from[1]['addr'] then
+                lastAtSymbol = from[1]['addr']:find("[^%@]+$")
+                local domain = from[1]['addr']:sub(lastAtSymbol, #from[1]['addr'])
+                local keyfile = io.open("/etc/rspamd/dkim/keys/" .. domain .. ".default")
+                if keyfile then
+                        keyfile:close()
+                        return {
+                                key = "/etc/rspamd/dkim/keys/" .. domain .. ".default",
+                                domain = domain,
+                                selector = "default"
+                        }
+                end
+        end
+        return false
+end
+EOD;