{"id":497,"date":"2022-07-24T13:47:20","date_gmt":"2022-07-24T20:47:20","guid":{"rendered":"https:\/\/blog.iabsolute.com\/?p=497"},"modified":"2022-07-24T13:47:20","modified_gmt":"2022-07-24T20:47:20","slug":"how-to-unblock-a-user-if-they-were-blocked-from-sending-emails-in-microsoft-365","status":"publish","type":"post","link":"https:\/\/blog.iabsolute.com\/?p=497","title":{"rendered":"How to Unblock a User if they were blocked from sending emails in Microsoft 365"},"content":{"rendered":"\n<p>Users in your organization might get blocked from sending emails in Microsoft 365 if they exceed one of the outbound sending limits or inbound spam policies.<\/p>\n\n\n\n<p>If a user is added to the&nbsp;<strong>restricted user<\/strong>&nbsp;list, they will receive the following NDR when trying to send emails out of the organization.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u201cYour message couldn\u2019t be delivered because you weren\u2019t recognized as a valid sender. The most common reason for this is that your email address is suspected of sending spam and it\u2019s no longer allowed to send email. Contact your email admin for assistance. Remote Server returned \u2018550 5.1.8 Access denied, bad outbound sender.\u201d<\/p><\/blockquote>\n\n\n\n<p>Admins in your organization can remove users from the&nbsp;<strong>restricted users<\/strong>&nbsp;list, this can be done either via the&nbsp;<strong>Microsoft Defender 365 portal<\/strong>&nbsp;or via&nbsp;<strong>PowerShell<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>To remove the user from the restricted list in the Microsoft Defender 365 Portal<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\"><li>Open the Microsoft 365 Defender portal&nbsp;<a href=\"https:\/\/security.microsoft.com\/\">https:\/\/security.microsoft.com<\/a>.<\/li><li>Go to&nbsp;<strong>Email &amp; Collaboration<\/strong>&nbsp;&gt;&nbsp;<strong>Review<\/strong>&nbsp;&gt;&nbsp;<strong>Restricted users<\/strong>.<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/www.thatlazyadmin.com\/wp-content\/uploads\/2022\/04\/graphical-user-interface-text-application-descr.png\" alt=\"Graphical user interface, text, application\n\nDescription automatically generated\" class=\"wp-image-11086\"\/><\/figure>\n\n\n\n<ol class=\"wp-block-list\"><li>Click on&nbsp;<strong>Restricted user<\/strong>&nbsp;page<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/www.thatlazyadmin.com\/wp-content\/uploads\/2022\/04\/graphical-user-interface-text-application-descr-1.png\" alt=\"Graphical user interface, text, application\n\nDescription automatically generated\" class=\"wp-image-11087\"\/><\/figure>\n\n\n\n<ol class=\"wp-block-list\"><li>On the restricted users page, you will see a list of users who are blocked from sending emails from your organization.<\/li><li>Review the user you would like to unblock, Select the user, and then click on&nbsp;<strong>Unblock.<\/strong><\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/www.thatlazyadmin.com\/wp-content\/uploads\/2022\/04\/graphical-user-interface-text-application-descr-2.png\" alt=\"Graphical user interface, text, application\n\nDescription automatically generated\" class=\"wp-image-11088\"\/><\/figure>\n\n\n\n<ol class=\"wp-block-list\"><li>Once you click on&nbsp;<strong>Unblock<\/strong>&nbsp;a page with actions will open, here you have an option to Enable MFA for the users.<\/li><li>When you\u2019re finished with the actions and recommendations for the user, click on&nbsp;<strong>Submit<\/strong>.<\/li><li>Click&nbsp;<strong>YES<\/strong>&nbsp;to confirm the change.<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/www.thatlazyadmin.com\/wp-content\/uploads\/2022\/04\/text-description-automatically-generated-with-med.png\" alt=\"Text\n\nDescription automatically generated with medium confidence\" class=\"wp-image-11089\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Users in your organization might get blocked from sending emails in Microsoft 365 if they exceed one of the outbound sending limits or inbound spam policies. If a user is added to the&nbsp;restricted user&nbsp;list, they will receive the following NDR &hellip; <a href=\"https:\/\/blog.iabsolute.com\/?p=497\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-497","post","type-post","status-publish","format-standard","hentry","category-exchange"],"_links":{"self":[{"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=\/wp\/v2\/posts\/497","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=497"}],"version-history":[{"count":1,"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=\/wp\/v2\/posts\/497\/revisions"}],"predecessor-version":[{"id":498,"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=\/wp\/v2\/posts\/497\/revisions\/498"}],"wp:attachment":[{"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.iabsolute.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}