Add first step at optional mailman configs

postfix.cf.tmpl

@@ -0,0 +1,17 @@
+# https://github.com/maxking/docker-mailman#setting-up-your-mta
+# https://mailu.io/1.7/faq.html?highlight=override#how-can-i-override-settings
+# https://github.com/Mailu/Mailu/blob/master/core/postfix/conf/main.cf
+
+unknown_local_recipient_reject_code = 550
+owner_request_special = no
+
+transport_maps =
+    ${podop}transport
+    regexp:/opt/mailman/core/var/data/postfix_lmtp
+
+local_recipient_maps =
+    regexp:/opt/mailman/core/var/data/postfix_lmtp
+
+relay_domains =
+    ${podop}transport
+    regexp:/opt/mailman/core/var/data/postfix_domains