554 Blocked - see https://ipcheck.proofpoint.com/?ip=224.208.157.5
250-proofpoint2.sfu.ca Hello 224.208.157.5 [224.208.157.5] (may be forged), pleased to meet you
250 ENHANCEDSTATUSCODES

HTTP/1.1 200 OK
Content-Length: 4506
Connection: close
Cache-Control: no-cache
Content-Type: text/html; charset=utf-8
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Content-Security-Policy: frame-ancestors 'self'