Possibly also stop being an open relay for a small corner of AWS...
# (the value on the table right-hand side is not used).
#
# Added by Alex Dehnert
-mynetworks = 66.92.29.156/32, 66.92.29.144/32, 127.0.0.1/32, 18.111.8.18/32, 18.102.208.15/32, [::1]/128
+mynetworks = 66.92.29.156/32, 66.92.29.144/32, 127.0.0.1/32, 18.111.8.18/32, [::1]/128
#mynetworks = 168.100.189.0/28, 127.0.0.0/8
#mynetworks = $config_directory/mynetworks
#mynetworks = hash:/etc/postfix/network_table
-o mynetworks=127.0.0.0/8
-o receive_override_options=no_unknown_recipient_checks,no_milters
-smtp-forward unix - - n - - smtp -o smtp_bind_address=18.102.208.11
-smtp-local unix - - n - - smtp -o smtp_bind_address=18.102.208.44
+#smtp-forward unix - - n - - smtp -o smtp_bind_address=18.102.208.11
+#smtp-local unix - - n - - smtp -o smtp_bind_address=18.102.208.44
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5