add README.smtpd-restrictons

README.smtpd-restrictons

@@ -0,0 +1,20 @@
+# ---
+# - See http://www.postfix.org/SMTPD_ACCESS_README.html
+# ---
+
+# - Order of evaluating smtpd restriction lists:
+# -
+# -    smtpd_client_restrictions
+# -    smtpd_helo_restrictions
+# -    smtpd_sender_restrictions
+# -    smtpd_relay_restrictions
+# -    smtpd_recipient_restrictions
+# -    smtpd_data_restrictions
+# -    smtpd_end_of_data_restrictions
+# -
+# - or for the Postfix fast ETRN service:
+# -
+# -    smtpd_client_restrictions
+# -    smtpd_helo_restrictions
+# -    smtpd_etrn_restrictions
+