=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Location: https://support.google.com/mail/answer/10957
Date: Mon, 29 Jul 2019 01:35:51 GMT
Expires: Mon, 29 Jul 2019 01:35:51 GMT
Cache-Control: private, max-age=0
Content-Type: text/html; charset=UTF-8
X-Content-Type-Options: nosniff
Server: support-content-ui
Content-Length: 241
X-XSS-Protection: 0
X-Frame-Options: SAMEORIGIN
Connection: close

HTTP/1.1 200 OK
P3P: CP=&quot;This is not a P3P policy! See g.co/p3phelp for more info.&quot;
Strict-Transport-Security: max-age=31536000; includeSubdomains
Content-Type: text/html; charset=UTF-8
Date: Mon, 29 Jul 2019 01:35:52 GMT
Expires: Mon, 29 Jul 2019 01:35:52 GMT
Cache-Control: private, max-age=0
Content-Security-Policy-Report-Only: object-src 'none';base-uri 'self';script-src 'nonce-/LXyAil3Bm/4Qbi1BNLa' 'unsafe-inline' 'unsafe-eval' 'strict-dynamic' https: http: 'report-sample';report-uri https://csp.withgoogle.com/csp/scfe
P3P: CP=&quot;This is not a P3P policy! See g.co/p3phelp for more info.&quot;
X-Content-Type-Options: nosniff
Server: support-content-ui
X-XSS-Protection: 0
X-Frame-Options: SAMEORIGIN
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Alt-Svc: quic=&quot;:443&quot;; ma=2592000; v=&quot;46,43,39&quot;
Accept-Ranges: none
Vary: Accept-Encoding
Connection: close

Request headers
================
HEAD /mail/answer/10957 HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Host: support.google.com
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.