# Google thinks they are better than everyone else, and don't need to be compatible with greylisting.
209.85.128.0/17 permit
# Same for Microsoft.
40.96.0.0/13 permit
40.104.0.0/15 permit
52.96.0.0/14 permit
2603:1000::/24 permit

# Some hosts that send bounces to the wrong guy (i.e., me)
153.122.0.0/15 reject please check mail server config, your server is sending bounce spam
153.121.32.0/19 reject please check mail server config, your server is sending bounce spam
192.241.146.138 reject please check mail server config, your server is sending bounce spam
209.97.143.86 reject please check mail server config, your server is sending bounce spam