554-mail.kreis-unna.de
554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.

HTTP/1.1 403 Forbidden
Content-Type: text/html
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-Content-Security-Policy: default-src 'self'
Strict-Transport-Security: max-age=31536000
Date: Thu, 14 Nov 2024 12:42:43 GMT
Content-Length: 1244