Outbound mail is sent from the following IPs:
173.203.187.63
173.203.2.19
108.166.43.129
184.106.54.63
146.20.161.63
173.203.6.128/27
108.166.43.64/26
184.106.54.64/26
173.203.187.64/26
146.20.161.64/26
Forwarded mail is sent from the following IPs:
204.232.172.40
173.203.2.22
108.166.43.128
161.47.34.7
146.20.86.8