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Users of mail.protection.outlook.com service do not receive e-mails from our email server, although the server reports the e-mails as being delivered RRS feed

  • Question

  • Hi, everyone,

    This is both a technical inquiry and a procedural one.

    We are trying to send e-mails from a private e-mail server to e-mail accounts that seem to be protected by mail.protection.outlook.com (the logs are showing relay=xxxxxxx.mail.protection.outlook.com). The customers are complaining that they are not receiving the e-mails.

    But, the mail logs are showing that server receiving the e-mails. (250 ......... Queued mail for delivery).

    Our mail server has a good or neutral reputation on all services, is not listed in any spam block list, is sending exclusively less than 500 e-mails per day and all are business e-mails (not only solicited but also paid for).

    There are multiple reports on the internet about lost mail on the mail.protection.outlook.com. We have zero experience with the outlook protection service. Could you please instruct of how to proceed? Is there a more appropriate place to ask these questions? 

    Is there anything that the user of the outlook protection system can do? A place where it can be said that they really want our e-mails?

    Thank you,

    Sorin Milutinovici

    Tuesday, June 25, 2019 6:44 PM

All replies

  • Hi, everyone,

    This is both a technical inquiry and a procedural one.

    We are trying to send e-mails from a private e-mail server to e-mail accounts that seem to be protected by mail.protection.outlook.com (the logs are showing relay=xxxxxxx.mail.protection.outlook.com). The customers are complaining that they are not receiving the e-mails.

    But, the mail logs are showing that server receiving the e-mails. (250 ......... Queued mail for delivery).

    Our mail server has a good or neutral reputation on all services, is not listed in any spam block list, is sending exclusively less than 500 e-mails per day and all are business e-mails (not only solicited but also paid for).

    There are multiple reports on the internet about lost mail on the mail.protection.outlook.com. We have zero experience with the outlook protection service. Could you please instruct of how to proceed? Is there a more appropriate place to ask these questions? 

    Is there anything that the user of the outlook protection system can do? A place where it can be said that they really want our e-mails?

    Thank you,

    Sorin Milutinovici

    The recipients should check their quarantines and whitelist as required. Message trace can be performed by their tenant admins as well.
    Tuesday, June 25, 2019 6:56 PM
  • Hi Sorin,

    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.


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    Monday, July 1, 2019 9:59 AM
    Moderator