This is the mail system at host mailgate01.uberspace.is. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system : host mrp-pt.mail.protection.outlook.com[52.101.68.32] said: 550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU6PEPF0000B61F.eurprd02.prod.outlook.com 2025-09-12T13:57:26.956Z 08DDF093EC7E330B] (in reply to RCPT TO command)