[https://products.office.com/en-us/CMSImages/Office365Logo_Orange.png?version=b8d100a9-0a8b-8e6a-88e1-ef488fee0470] Your message to helpdesk.amv2@usim.edu.my couldn't be delivered. The group helpdesk.amv2 only accepts messages from people in its organization or on its allowed senders list, and your email address isn't on the list. mauve-patches Office 365 helpdesk.amv2 Sender Action Required Sender not allowed How to Fix It It appears you aren't in the same organization as the group (or a sub-group) you're sending to or your email address isn't on the group's allowed senders list. Ask the owner of the group to grant you permission to send to it, and then try again. If the group belongs to a different organization than yours, contact the organization's customer service department for assistance. If the group is in your organization and you don't know who the group owner is, you can find it by doing the following in either Outlook on the web or Outlook: * Open your Sent folder and select the original message. * If you're using Outlook on the web, select the group name located on the To or CC line. If you're using Outlook, double-click the group name located on the To or CC line. * In Outlook on the web, from the pop-up dialog box, choose Owner. In Outlook, choose Contact. The owner's name is listed under Owner. The owner of the group may have intentionally chosen to restrict who can send messages to it, and they may not want to adjust the existing restriction. In this case, you'll have to contact the group members by some other means, such as sending an email message to their individual email addresses or contacting them by phone. Was this helpful? Send feedback to Microsoft. ________________________________ More Info for Email Admins Status code: 550 5.7.133 This error occurs when the distribution group, security group, or Microsoft 365 group is configured to accept messages only from authenticated senders (senders in the same organization or those added to the group's allowed senders list). To fix the issue, the recipient's email admin or the group owner must add the sender's email address to the group's allowed senders list or change the group's delivery management setting to accept messages from senders inside and outside of the organization. Usually this issue can only be fixed by the recipient's email admin or the group owner. For more information and steps to fix this error, see Fix email delivery issues for error code 5.7.133 in Office 365. Original Message Details Created Date: 11/29/2021 6:41:30 AM Sender Address: mauve-patches@sourceware.org Recipient Address: helpdesk.amv2@usim.edu.my Subject: WARM REGARDS Error Details Reported error: 550 5.7.133 RESOLVER.RST.SenderNotAuthenticatedForGroup; authentication required; Delivery restriction check failed because the sender was not authenticated when sending to this group DSN generated by: SI2PR03MB6055.apcprd03.prod.outlook.com Original Message Headers Authentication-Results: spf=neutral (sender IP is 52.221.55.32) smtp.mailfrom=sourceware.org; dkim=none (message not signed) header.d=none;dmarc=fail action=none header.from=sourceware.org;compauth=fail reason=001 Received-SPF: Neutral (protection.outlook.com: 52.221.55.32 is neither permitted nor denied by domain of sourceware.org) Content-Type: multipart/alternative; boundary="===============0075302204==" MIME-Version: 1.0 Subject: WARM REGARDS To: Recipients From: "BEN JOHNSON" Date: Mon, 29 Nov 2021 14:41:30 +0800 Reply-To: bjattorneys5@gmail.com X-Atmail-Id: mauve-patches@sourceware.org X-atmailcloud-spam-score: 1000 X-atmailcloud-spam-bar: +++++++++++++++++++++++++++++++++++++++++++++++++++ X-atmailcloud-spam-action: reject Message-ID: <0917ea07-f576-4ddb-9f18-dbcf5cc9a1eb@PSAAPC01FT062.eop-APC01.prod.protection.outlook.com> Return-Path: mauve-patches@sourceware.org X-EOPAttributedMessage: 0 X-EOPTenantAttributedMessage: 96395265-2ab8-44ef-bffb-2a8495ef1acf:0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: e7ada1ec-f112-4edf-165c-08d9b303dc09 X-MS-TrafficTypeDiagnostic: SI2PR03MB6055: X-MS-Oob-TLC-OOBClassifiers: OLM:5516; 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