40.104.0.0/15 permit
52.96.0.0/14 permit
2603:1000::/24 permit
-# And Sparkpost.
-156.70.4.0/23 permit
-156.70.2.0/23 permit
-147.253.208.0/20 permit
# And Apple.
57.103.64.0/18 permit
+# And Sendgrid.
+149.72.0.0/16 permit
# Some hosts that send bounces to the wrong guy (i.e., me)
192.241.146.138 reject please check mail server config, your server is sending bounce spam