Posted On November 2, 2021

An Indication That Microsoft Office 365 Email Connector Doesn’t Like Large IP Blocks

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November 2, 2021November 2, 2021 kimconnectkimconnect 0 Comments

As we’ve advised our clients to configure their O365 to ‘whitelist’ or allow email relays from our email servers, there appears to be a problem when the clients attempt to configure email connectors with a large CIDR block such as /20.

Here’s another screenshot

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