Customers using the Conetix SpamExperts service with externally hosted email should ensure that their email host or email server has the Conetix SpamExperts IP range allow listed to ensure there are no delays, rejections and false positive spam message detection on the destination email server.

Our Spam Experts Cluster IP range is

Exchange Server

Implement a Mail Flow Rule for the spam filter IP range per Microsoft’s documentation:

Microsoft 365

Implement an Exchange Online Connector per our guide here:


Clients using Microsoft 365 via Conetix have connectors created on deployment.

Other Web Hosts

If your email host includes spam filtering our recommendation is to use your email hosts email filtering. However if you’d like to use our filtering service instead it’s highly recommend you disable the filter on your email host’s side.

Please note that having multiple spam filters active on a domain can result in email flow problems.

If you’re unsure how to accomplish the above we recommend consulting your IT provider or current email host for assistance.

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