How to allow / deny IP in Office 365 SMTP Relay connection? Cloud

When you set up an in-premises printer, scanner, fax, or line of business (LOB) application that needs to send email, you need to allow the in house SMTP IP in Office 365

We need to allow/whitelist in-house network IP to use the SMTP Relay in Office 365

The following steps shows how to add the IP address to Allow/Whitelist on Exchange Admin Center in Office365

Open the Exchange Admin Center -> Click on Protection -> Clock on Connection Filter -> Double Click on Default – > Click on Connection Filtering

In the section of IP Allow Lists, click on + symbol to add a new IP Address


Once the IP is added, you will see the following screen

IP is added

At Velan, our server support engineers can help you to add your in-house network IP to use Office 365 to send emails. We troubleshoot problems like these for our clients every day. If you are interested in our service, please fill the Quick connect form to get in touch with us


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