IP Addresses for Mail Delivery, Directory Sync, and POP3/LDAP Authentication

IP Addresses for Mail Delivery

Transport Servers

United States


Asia Pacific

Inbound Gateway Servers

IP Addresses for LDAP/Active Directory User Sync

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.
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