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How to close the internal domain spoofing of Exchange Server RRS feed

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  • Hi Jakkireddy,

    Please refer to the following article, it provides detailed steps to prevent internal email spoofing:

    How to prevent internal email spoofing

    There are two methods I will demonstrate:

    How to block spoofing attempts using SPF record,
    How to prevent internal spoofing with a dedicated Receive connector

    Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.


    Best Regards,
    Niko Cheng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


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    Tuesday, June 11, 2019 8:33 AM
    Moderator
  • Hi Jakkireddy,

    I'm just writing to check how's everything going? If you have any questions or needed further help on this issue, please feel free to post back. If the issue has been resolved, please mark the helpful replies as answers, this will make answer searching in the forum easier and be beneficial to other community members as well.

    Thanks for your understanding.


    Best Regards,
    Niko Cheng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    Wednesday, June 19, 2019 8:57 AM
    Moderator