[https://products.office.com/en-us/CMSImages/Office365Logo_Orange.png?version...] Your message to Dylan@schools.com couldn't be delivered. Dylan wasn't found at schools.com. webmaster Office 365 Dylan Action Required Recipient Unknown To address

How to Fix It The address may be misspelled or may not exist. Try one or more of the following:

* Send the message again following these steps: In Outlook, open this non-delivery report (NDR) and choose Send Again from the Report ribbon. In Outlook on the web, select this NDR, then select the link "To send this message again, click here." Then delete and retype the entire recipient address. If prompted with an Auto-Complete List suggestion don't select it. After typing the complete address, click Send. * Contact the recipient (by phone, for example) to check that the address exists and is correct. * The recipient may have set up email forwarding to an incorrect address. Ask them to check that any forwarding they've set up is working correctly. * Clear the recipient Auto-Complete List in Outlook or Outlook on the web by following the steps in this article: Fix email delivery issues for error code 5.1.10 in Office 365https://go.microsoft.com/fwlink/?LinkId=532972, and then send the message again. Retype the entire recipient address before selecting Send.

If the problem continues, forward this message to your email admin. If you're an email admin, refer to the More Info for Email Admins section below.

Was this helpful? Send feedback to Microsofthttps://go.microsoft.com/fwlink/?LinkId=525921. ________________________________

More Info for Email Admins Status code: 550 5.1.10

This error occurs because the sender sent a message to an email address hosted by Office 365 but the address is incorrect or doesn't exist at the destination domain. The error is reported by the recipient domain's email server, but most often it must be fixed by the person who sent the message. If the steps in the How to Fix It section above don't fix the problem, and you're the email admin for the recipient, try one or more of the following:

The email address exists and is correct - Confirm that the recipient address exists, is correct, and is accepting messages.

Synchronize your directories - If you have a hybrid environment and are using directory synchronization make sure the recipient's email address is synced correctly in both Office 365 and in your on-premises directory.

Errant forwarding rule - Check for forwarding rules that aren't behaving as expected. Forwarding can be set up by an admin via mail flow rules or mailbox forwarding address settings, or by the recipient via the Inbox Rules feature.

Recipient has a valid license - Make sure the recipient has an Office 365 license assigned to them. The recipient's email admin can use the Office 365 admin center to assign a license (Users > Active Users > select the recipient > Assigned License > Edit).

Mail flow settings and MX records are not correct - Misconfigured mail flow or MX record settings can cause this error. Check your Office 365 mail flow settings to make sure your domain and any mail flow connectors are set up correctly. Also, work with your domain registrar to make sure the MX records for your domain are configured correctly.

For more information and additional tips to fix this issue, see Fix email delivery issues for error code 5.1.10 in Office 365https://go.microsoft.com/fwlink/?LinkId=532972.

Original Message Details Created Date: 3/29/2021 5:16:56 PM Sender Address: webmaster@inkscape.org Recipient Address: Dylan@schools.com Subject: Your registration on inkscape.org

Error Details Reported error: 550 5.1.10 RESOLVER.ADR.RecipientNotFound; Recipient Dylan@schools.com not found by SMTP address lookup DSN generated by: DM5PR02MB2636.namprd02.prod.outlook.com

Message Hops HOP TIME (UTC) FROM TO WITH RELAY TIME 1 3/29/2021 5:16:56 PM inkscape1.osuosl.org inkscape1.osuosl.org ESMTP * 2 3/29/2021 5:16:57 PM inkscape1.osuosl.org smtp2.osuosl.org ESMTP 1 sec 3 3/29/2021 5:16:57 PM smtp2.osuosl.org localhost ESMTP * 4 3/29/2021 5:16:57 PM localhost smtp2.osuosl.org ESMTP * 5 3/29/2021 5:16:58 PM smtp2.osuosl.org SN1NAM02FT034.mail.protection.outlook.com Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) 1 sec 6 3/29/2021 5:16:58 PM SN1NAM02FT034.eop-nam02.prod.protection.outlook.com SN7PR04CA0210.outlook.office365.com Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) * 7 3/29/2021 5:16:59 PM SN7PR04CA0210.namprd04.prod.outlook.com DM5PR02MB2636.namprd02.prod.outlook.com Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) 1 sec

Original Message Headers

Received: from SN7PR04CA0210.namprd04.prod.outlook.com (2603:10b6:806:126::35) by DM5PR02MB2636.namprd02.prod.outlook.com (2603:10b6:3:43::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3977.30; Mon, 29 Mar 2021 17:16:59 +0000 Received: from SN1NAM02FT034.eop-nam02.prod.protection.outlook.com (2603:10b6:806:126:cafe::87) by SN7PR04CA0210.outlook.office365.com (2603:10b6:806:126::35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3977.28 via Frontend Transport; Mon, 29 Mar 2021 17:16:58 +0000 Authentication-Results: spf=pass (sender IP is 140.211.166.133) smtp.mailfrom=inkscape.org; schools.com; dkim=none (message not signed) header.d=none;schools.com; dmarc=bestguesspass action=none header.from=inkscape.org; Received-SPF: Pass (protection.outlook.com: domain of inkscape.org designates 140.211.166.133 as permitted sender) receiver=protection.outlook.com; client-ip=140.211.166.133; helo=smtp2.osuosl.org; Received: from smtp2.osuosl.org (140.211.166.133) by SN1NAM02FT034.mail.protection.outlook.com (10.152.72.141) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3977.25 via Frontend Transport; Mon, 29 Mar 2021 17:16:58 +0000 Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id AAFBA4012E for Dylan@schools.com; Mon, 29 Mar 2021 17:16:57 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id CL65oN1PZied for Dylan@schools.com; Mon, 29 Mar 2021 17:16:57 +0000 (UTC) Received: from inkscape1.osuosl.org (inkscape1.osuosl.org [140.211.9.79]) by smtp2.osuosl.org (Postfix) with ESMTP id 162314011B for Dylan@schools.com; Mon, 29 Mar 2021 17:16:57 +0000 (UTC) Received: from inkscape1.osuosl.org (localhost [IPv6:::1]) by inkscape1.osuosl.org (Postfix) with ESMTP id CE6D3E9EF for Dylan@schools.com; Mon, 29 Mar 2021 17:16:56 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Your registration on inkscape.org From: webmaster@inkscape.org To: Dylan@schools.com Date: Mon, 29 Mar 2021 17:16:56 -0000 Message-ID: 20210329171656.21825.41104@inkscape1.osuosl.org Return-Path: webmaster@inkscape.org X-EOPAttributedMessage: 0 X-EOPTenantAttributedMessage: 1fe36d49-b4c7-41a0-ad49-0fd621b8de98:0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 525c5c0d-4d40-494f-14f0-08d8f2d675bb X-MS-TrafficTypeDiagnostic: DM5PR02MB2636: