How to Restrict Outbound Emails in Dynamics 365 to Specific Domains Only?

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Posted on by CU30101535-0

Hello everyone,

I’m looking for a way to globally restrict outbound emails in Microsoft Dynamics 365 so that, in our dev environment, they are only sent to specific domains. I want to block any email from being sent to recipients outside of these allowed domains, ideally through a rule or setting that would apply automatically across all customer journeys and marketing campaigns.

I’m aware that I can filter audiences with segments within individual Real Time journeys, but I’m looking for a global-level configuration to avoid needing to customize each journey individually. Does Dynamics 365 offer a built-in allowlist or email restriction feature that can be applied across the entire environment? Or would this require an external integration or customization?

Thanks in advance for any insights or recommendations!

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Vahid Ghafarpour 12,068 Super User 2025 Season 2 on at

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I hope this trick can help you

https://www.codetwo.com/admins-blog/how-to-prevent-office-365-users-from-sending-emails-outside-organization/

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CU30101535-0 2 on at

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Thanks for your answer. Unfortunately we have not connected Exchange with Dynamics, so that trick is not applicable in our case.

Is there not any other alternative?

Thanks again

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