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How to remove a user from a block list in Office 365

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How to remove a user from a block list in Office 365

Postby blin » Wed Sep 14, 2016 4:10 pm

Based on Microsoft, "If a user continuously sends emails from Office 365 that is classified as spam, they will be blocked from sending any more email messages. When a sender is blocked from sending emails, they'll receive a Non-Delivery Report (NDR or email failed to send message) that provides specific information on the steps they have to take to unblock themselves. Not only can individual users be blocked by the service, but specific web sites, domains, and IP addresses can be blocked as well. In some cases, domains or web sites can be added to a block list just because they appear in a spam message. As the Office 365 admin, you can try to get users, web sites, domains, and IP addresses removed from third-party block lists. Use the links in the table at the bottom of this article to contact each third-party and follow the instructions. If someone outside of Office 365 is unable to send you messages to your Office 365 account, their account may have ended up on the external blocked senders list. Users outside of Office 365 can attempt to remove themselves from the blocked senders list by using the self-service delisting portal".

To removing a user, domain, or IP address from a block list after sending spam email, please follow these steps:

1. In the EAC, navigate to protection > action center.

2. Select the Search icon and enter the SMTP address of the blocked user.

3. Click Unblock Account in the description pane.

4. Click Yes to confirm the change.
from a block list after sending spam email
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