# 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 your config, you are sending bounce spam
153.121.32.0/19 reject please check your config, you are sending bounce spam