How To: Secure the Mail Connector SMTP relay when coexisting with Office 365. (4345857)

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How To: Secure the Mail Connector SMTP relay when coexisting with Office 365.
Description

When using the Coexistence Manager for Notes (CMN) the Mail Connector in coexistence with Office 365, additional considerations must be taken into account in order to secure the Mail Connector SMTP relay that may be exposed to the Internet.
Resolution

In order to secure the Mail Connector from allowing connections from undesired SMTP servers on the Internet, you may want to place the Mail Connector behind a firewall and only allow traffic from Microsoft’s Office 365 environment. The address ranges used by Microsoft can be found here:
https://support.office.com/en-us/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2
Defect ID

TF00334060

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