Your message to asta-vorstand@hfk-bremen.de couldn't be delivered.

The group asta-vorstand only accepts messages from people in its organization or on its allowed senders list, and your email address isn't on the list.

stapf Office 365 asta-vorstand 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: 1/8/2024 12:38:48 PM Sender Address: stapf@zapf.in Recipient Address: asta-vorstand@hfk-bremen.de Subject: Resolution: Wissenschaftliche Kooperationen stärken

Error Details

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 Message rejected by: AS8PR08MB6423.eurprd08.prod.outlook.com

Notification Details

Sent by: AS8PR08MB6423.eurprd08.prod.outlook.com

Original Message Headers

Received: from AS8P251CA0016.EURP251.PROD.OUTLOOK.COM (2603:10a6:20b:2f2::11)
 by AS8PR08MB6423.eurprd08.prod.outlook.com (2603:10a6:20b:318::13) with
 Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7159.21; Mon, 8 Jan
 2024 12:38:55 +0000
Received: from AMS0EPF00000195.eurprd05.prod.outlook.com
 (2603:10a6:20b:2f2:cafe::67) by AS8P251CA0016.outlook.office365.com
 (2603:10a6:20b:2f2::11) with Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7159.21 via Frontend
 Transport; Mon, 8 Jan 2024 12:38:55 +0000
Authentication-Results: spf=pass (sender IP is 94.130.65.175)
 smtp.mailfrom=zapf.in; dkim=none (message not signed)
 header.d=none;dmarc=bestguesspass action=none header.from=zapf.in;
Received-SPF: Pass (protection.outlook.com: domain of zapf.in designates
 94.130.65.175 as permitted sender) receiver=protection.outlook.com;
 client-ip=94.130.65.175; helo=mail.zapf.in; pr=C
Received: from mail.zapf.in (94.130.65.175) by
 AMS0EPF00000195.mail.protection.outlook.com (10.167.16.215) with Microsoft
 SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id
 15.20.7181.13 via Frontend Transport; Mon, 8 Jan 2024 12:38:54 +0000
Received: from [172.18.20.125] (nat-2096.dyn.hrz.tu-darmstadt.de [130.83.112.48])
	by mail.zapf.in (Postfix) with ESMTPSA id 290FFE0439;
	Mon,  8 Jan 2024 13:38:51 +0100 (CET)
Content-Type: multipart/mixed; boundary="------------qPD00y3sH5X2GV08hh521xGl"
Message-ID: <a308fa74-059b-414a-bced-c1357d58c7cd@zapf.in>
Date: Mon, 8 Jan 2024 13:38:48 +0100
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
From: =?UTF-8?Q?St=C3=A4ndiger_Ausschuss_aller_Physikfachschaften?=
 <stapf@zapf.in>
Subject: =?UTF-8?Q?Resolution=3A_Wissenschaftliche_Kooperationen_st=C3=A4rke?=
 =?UTF-8?Q?n?=
Reply-To: stapf@zapf.in
Organization: Zusammenkunft aller Physikfachschaften (ZaPF)
To: Verborgene_Empfaenger: ;
Return-Path: stapf@zapf.in
X-EOPAttributedMessage: 0
X-EOPTenantAttributedMessage: 09e769ef-38f0-4cf4-a9e2-194cccd24761:0
X-MS-PublicTrafficType: Email
X-MS-TrafficTypeDiagnostic: AMS0EPF00000195:EE_|AS8PR08MB6423:EE_
X-MS-Office365-Filtering-Correlation-Id: bb9741b8-e6b2-4f6a-245f-08dc1046c6c9