NAT IPs for EUC: 18.195.63.210, 35.157.1.198, 35.157.24.134, 18.195.191.138
NAT IPs for US : 52.7.20.16, 52.4.214.143, 52.6.72.79, 52.1.79.135
Sendgrid IPs - 168.245.124.150, 167.89.109.29, 192.254.119.198, 167.89.22.146, 192.254.127.51, 192.254.127.52