220-egate.net56.com ESMTP Proxmox
250-egate.net56.com
250-SIZE 100485760
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 SMTPUTF8

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'