Delivery has failed to these recipients or groups:
wesleytan@smu.edu.sg
Ask the recipient's email admin to add you to the accept list for the recipient.
For more information, see DSN 5.7.129 Errors in Exchange Online and Office 365.
Diagnostic information for administrators:
Generating server: TY0PR0101MB4430.apcprd01.prod.exchangelabs.com
wesleytan@smu.edu.sg
Remote server returned '550 5.7.129 RESOLVER.RST.RestrictedToRecipientsPermission; not authorized to send to recipient because the sender isn't on the recipient's list of senders to accept mail from'
Original message headers:
Received: from PS2PR01CA0068.apcprd01.prod.exchangelabs.com (2603:1096:300:57::32) by TY0PR0101MB4430.apcprd01.prod.exchangelabs.com (2603:1096:400:1b5::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8377.22; Tue, 28 Jan 2025 10:47:04 +0000 Received: from HK2PEPF00006FB0.apcprd02.prod.outlook.com (2603:1096:300:57:cafe::d0) by PS2PR01CA0068.outlook.office365.com (2603:1096:300:57::32) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8377.22 via Frontend Transport; Tue, 28 Jan 2025 10:47:04 +0000 Authentication-Results: spf=none (sender IP is 83.138.65.30) smtp.mailfrom=echotoc.com; dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=echotoc.com; Received-SPF: None (protection.outlook.com: echotoc.com does not designate permitted sender hosts) Received: from mediaf.han-solo.net (83.138.65.30) by HK2PEPF00006FB0.mail.protection.outlook.com (10.167.8.6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8398.14 via Frontend Transport; Tue, 28 Jan 2025 10:47:02 +0000 Received: from User ([165.154.252.200]) (authenticated bits=0) by mediaf.han-solo.net (8.14.9/8.13.6) with ESMTP id 50SAdt5F024812; Tue, 28 Jan 2025 11:40:08 +0100 Message-ID: <202501281040.50SAdt5F024812@mediaf.han-solo.net> Reply-To: <murraygoals27@email-temp.com> From: "Claes"<murraygoals27@email-temp.com> Subject: Greetings Date: Tue, 28 Jan 2025 11:41:35 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="Windows-1251" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Apparently-To: <wgsh@bit.edu.cn> Return-Path: murraygoals27@email-temp.com X-EOPAttributedMessage: 0 X-EOPTenantAttributedMessage: c98a79ca-5a9a-4791-a243-f06afd67464d:0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: HK2PEPF00006FB0:EE_|TY0PR0101MB4430:EE_ X-MS-Office365-Filtering-Correlation-Id: 71cd1355-8be3-422f-eb21-08dd3f891a13