Web search results for query: "MailProtector inbound IP addresses list 2025 Exchange Online connector"

Links: [{"title":"Office 365 - Inbound Connector – Mailprotector Help Center","url":"https://support.mailprotector.com/hc/en-us/articles/115005484203-Office-365-Inbound-Connector"},{"title":"Configure Enhanced Filtering with Exchange Online – Mailprotector Help Center","url":"https://support.mailprotector.com/hc/en-us/articles/7113172328852-Configure-Enhanced-Filtering-with-Exchange-Online"},{"title":"Office 365 - Outbound Connector – Mailprotector Help Center","url":"https://support.mailprotector.com/hc/en-us/articles/115005493566-Office-365-Outbound-Connector"},{"title":"Email Security and Exchange Online (Office 365) - setup of the inbound flow – Heimdal Assistance and Support","url":"https://support.heimdalsecurity.com/hc/en-us/articles/22421112073501-Email-Security-and-Exchange-Online-Office-365-setup-of-the-inbound-flow"},{"title":"PowerShell Scripts for Connectors – Mailprotector Help Center","url":"https://support.mailprotector.com/hc/en-us/articles/360019926212-PowerShell-Scripts-for-Connectors"},{"title":"Step 3 - Confirm Inbound Mail Destination Host – Mailprotector Help Center","url":"https://support.mailprotector.com/hc/en-us/articles/200154715-Step-3-Confirm-Inbound-Mail-Destination-Host"},{"title":"Retrieving the list of any Public IP address sending email to my Exchange Online tenant? - Microsoft Q&A","url":"https://learn.microsoft.com/en-us/answers/questions/2157556/retrieving-the-list-of-any-public-ip-address-sendi"},{"title":"Routing internal mail from Exchange Online / Microsoft 365 ...","url":"https://support.mailprotector.com/hc/en-us/articles/360037689852-Routing-internal-mail-from-Exchange-Online-Microsoft-365-to-Mailprotector-s-smarthost"},{"title":"Office 365 Connectors - Summary – Mailprotector Help Center","url":"https://support.mailprotector.com/hc/en-us/articles/206461613-Office-365-Connectors-Summary"},{"title":"Enhanced filtering for connectors in Exchange Online | Microsoft Learn","url":"https://learn.microsoft.com/en-us/Exchange/mail-flow-best-practices/use-connectors-to-configure-mail-flow/enhanced-filtering-for-connectors"}]

Based on the search results, here's the information about Mailprotector inbound IP addresses for Exchange Online connectors:

## Mailprotector Inbound IP Addresses for Exchange Online Connector

The IP addresses for configuring the inbound connector are:
- **52.0.70.91**
- **52.0.31.31**
- **52.0.74.211**

### Configuration Notes

Configuring an inbound connector in the Microsoft 365 (M365) tenant domain is required to restrict message delivery from Mailprotector's servers and prevent spammers from using a direct connection to the M365 host address, bypassing Mailprotector scanning.(no content)The inbound connector will reject mail flow that does not come from Mailprotector after turning it on. If the MX records for your domain already point to Mailprotector, it is safe to turn on the inbound connector. If the MX record still points directly to Office 365 or another host, do not turn this connector on until Mailprotector is scanning email.

### PowerShell Configuration

If emails are being sent to Junk too often, you can add these IPs to the Default Connection Filter using:
`Set-HostedConnectionFilterPolicy "Default" -IPAllowList 52.0.70.91,52.0.74.211,52.0.31.31`

### Additional Resources

Before proceeding, ensure that you have allowed all Mailprotector IP addresses through your firewall. You can find a complete list of them on the Mailprotector Help Center.

For the most up-to-date and complete list of IP addresses, I recommend checking the official Mailprotector Help Center documentation directly, as IP addresses may be updated over time.


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