IP Addresses for Mail Delivery
Transport Servers
United States
52.0.70.91 52.0.74.211 52.0.31.31
Europe
54.229.38.56 54.229.197.37 54.229.198.191
Asia Pacific
54.66.143.79 54.66.158.252 54.66.239.122
Inbound Gateway Servers
52.0.43.153
52.0.90.6
52.0.156.43
52.0.161.190
52.1.76.196
52.1.130.188
52.1.217.73
54.85.114.151
54.152.152.44
54.80.77.105
52.204.186.160
3.213.159.102
23.20.39.50
18.214.219.227
34.233.23.45
IP Addresses for LDAP/Active Directory User Sync
54.152.160.142
54.152.160.187
IP Addresses for POP3/LDAP Authentication (Deprecated)
NOTE: POP3 authentication connects via ports 110 & 995 - You will need to ensure your firewall is open on 110 & 995 from the above Mailprotector ranges.
54.152.160.142 54.152.160.187
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