Exchange Online Protection IP addresses


Applies to: Exchange Online Protection

Topic Last Modified: 2018-04-02

The following Microsoft data center IP addresses are used by Microsoft Exchange Online Protection (EOP) when sending email, receiving email, or for Exchange Online Protection portal and administrative services. In order to send and receive messages from EOP or use the administrative services, make sure your network allows connections from these IP addresses.

Microsoft is developing a REST-based web service for the IP address and FQDN entries on this page. This new service will help you configure and update network perimeter devices such as firewalls and proxy servers. You can download the list of endpoints, the current version of the list, or specific changes. This service will eventually replace the XML document, RSS feed, and the IP address and FQDN entries on this page. To try out this new service, go to Web service.

The following is the complete list as of 3/1/2018 of EOP IP address ranges.


The IP address ranges provided here are only used for relay through customer connectors. Changes to the list of IP addresses are rare, and are communicated in advance. To ensure that messages that you send to your business partners, a smart host, or an on-premises environment route through the service’s published range of IP addresses, you must configure the correct connector for routing to each destination. For more information about connectors, see Set up connectors to route mail between Office 365 and your own email servers. 
The IP addresses in this topic can change over time. For a record of all IP addresses that have been added, changed, or deprecated in the past year, see Change notification for EOP IP addresses.

For information about IP addresses used by Microsoft Office 365, see Office 365 URLs and IP address ranges.

Exchange Online Protection routes mail in the most efficient manner while maintaining compliance with our contractual obligations to our customers. With this in mind, the below EOP endpoints are the current list of regional IPv4 ranges; however, these IP addresses may be re-provisioned without advance notice to another function within EOP to support capacity and efficiency. In these events mail will still flow based on our contractual obligations and we’ll do our best to update this list of endpoints in a timely manner after the changes have been made. At this time we don’t maintain lists of regional endpoints for other parts of Office 365.









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