mx.google.com rejected your message to the following email addresses:

mvdbruggegen@gmail.com
Your message wasn't delivered because the recipient's email provider rejected it.

mx.google.com gave this error:
This mail is unauthenticated, which poses a security risk to the sender and Gmail users, and has been blocked. The sender must authenticate with at least one of SPF or DKIM. For this message, DKIM checks did not pass and SPF check for [hotmail.com] did not pass with ip: [2a01:111:f403:7011::202]. The sender should visit https://support.google.com/mail/answer/81126#authentication for instructions on setting up authentication. q16-20020a056402033000b00529fa041d40si2968116edw.353 - gsmtp







Diagnostic information for administrators:

Generating server: MA0P287MB0170.INDP287.PROD.OUTLOOK.COM

mvdbruggegen@gmail.com
mx.google.com
Remote server returned '550-5.7.26 This mail is unauthenticated, which poses a security risk to the 550-5.7.26 sender and Gmail users, and has been blocked. The sender must 550-5.7.26 authenticate with at least one of SPF or DKIM. For this message, 550-5.7.26 DKIM checks did not pass and SPF check for [hotmail.com] did not 550-5.7.26 pass with ip: [2a01:111:f403:7011::202]. The sender should visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for 550 5.7.26 instructions on setting up authentication. q16-20020a056402033000b00529fa041d40si2968116edw.353 - gsmtp'

Original message headers:

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Authentication-Results: spf=temperror (sender IP is 140.211.166.136)
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Subject: Your registration on inkscape.org
From: webmaster@inkscape.org
To: mvdbrugge@hotmail.com
Date: Sat, 09 Sep 2023 07:01:29 -0000
Message-ID: <169424288911.28966.15577411991716532004@inkscape1.osuosl.org>
X-IncomingHeaderCount: 15
Return-Path: webmaster@inkscape.org
X-EOPAttributedMessage: 0
X-EOPTenantAttributedMessage: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa:0
X-MS-PublicTrafficType: Email
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X-Sender-IP: 140.211.166.136
X-SID-PRA: WEBMASTER@INKSCAPE.ORG
X-SID-Result: NONE
X-Microsoft-Antispam: BCL:0;
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Sep 2023 07:01:32.2434
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X-MS-Exchange-CrossTenant-AuthSource: VI1EUR06FT014.eop-eur06.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: Internet
X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MA0P287MB0154
X-MS-Exchange-Transport-EndToEndLatency: 00:00:07.0621533
X-MS-Exchange-Processed-By-BccFoldering: 15.20.6768.024
X-MS-Exchange-Inbox-Rules-Loop: mvdbrugge@hotmail.com
X-OriginatorOrg: sct-15-20-4755-11-msonline-outlook-bafef.templateTenant