=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 302 Found
Location: https://mail.google.com/mail/
Cache-Control: private
Content-Type: text/html; charset=UTF-8
X-Content-Type-Options: nosniff
Date: Mon, 29 Jul 2019 01:35:56 GMT
Server: sffe
Content-Length: 226
X-XSS-Protection: 0
Connection: close

HTTP/1.1 302 Moved Temporarily
Content-Type: text/html; charset=UTF-8
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: Mon, 01 Jan 1990 00:00:00 GMT
Date: Mon, 29 Jul 2019 01:35:56 GMT
Location: https://accounts.google.com/ServiceLogin?service=mail&amp;passive=true&amp;rm=false&amp;continue=https://mail.google.com/mail/&amp;ss=1&amp;scc=1&amp;ltmpl=default&amp;ltmplcache=2&amp;emr=1&amp;osid=1#
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Server: GSE
Alt-Svc: clear
Accept-Ranges: none
Vary: Accept-Encoding
Connection: close

HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
X-Frame-Options: DENY
x-auto-login: realm=com.google&amp;args=service%3Dmail%26continue%3Dhttps%253A%252F%252Fmail.google.com%252Fmail%252F
Link: &lt;https://www.google.com/gmail/&gt;; rel=&quot;canonical&quot;
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: Mon, 01 Jan 1990 00:00:00 GMT
Date: Mon, 29 Jul 2019 01:35:57 GMT
Content-Length: 1331366
Strict-Transport-Security: max-age=31536000; includeSubDomains
Content-Security-Policy: script-src 'report-sample' 'nonce-pIX4ITRjcKHwj+hKp4VfGA' 'unsafe-inline' 'unsafe-eval';object-src 'none';base-uri 'self';report-uri /cspreport
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Server: GSE
Set-Cookie: GAPS=1:beVlr6D75a58nkrKNP1fsWcIYMtPKA:Am3xTj_41MQMCG4f;Path=/;Expires=Wed, 28-Jul-2021 01:35:56 GMT;Secure;HttpOnly;Priority=HIGH
Alt-Svc: quic=&quot;:443&quot;; ma=2592000; v=&quot;46,43,39&quot;
Connection: close

Request headers
================
HEAD /ServiceLogin?service=mail&amp;passive=true&amp;rm=false&amp;continue=https://mail.google.com/mail/&amp;ss=1&amp;scc=1&amp;ltmpl=default&amp;ltmplcache=2&amp;emr=1&amp;osid=1 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: accounts.google.com
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.