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PiotrKrugioka-1668 asked EricYin-MSFT commented

How to configure allowed/blocked sender domains in M365

Hello,
Where can I add allowed or blocked sender domains in M365 Exchange service? I checked all the options in admin panel but I can't find this option.

office-exchange-server-administration
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michev answered michev commented
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Thanks, but is there an easy way to set a domain, that I want to receive emails from? For example, how can I simply add *exampledomain.com to allowed sender domain?

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michev avatar image michev PiotrKrugioka-1668 ·

You can use the "trusted sender" config for that, which is almost the same process. Available methods are listed here: https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/create-safe-sender-lists-in-office-365?view=o365-worldwide

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EricYin-MSFT answered

Hi,
An easy method is mail flow rule:

113596-%E6%8D%95%E8%8E%B7.png



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PiotrKrugioka-1668 answered EricYin-MSFT commented

Thanks, but I want to allow or block external domain (not in my organization, for example I want to receive all emails from *exampledomain.com and block all e-mails from *notallowedemails.com. Could you please give me a solution to do that?

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If you can receive exampledomain.com without the mail flow rule, you only need to specify notallowedemails.com in my picture.

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Hi,
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