=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 307 Temporary Redirect
Server: AkamaiGHost
Content-Length: 0
Location: https://us2.list-manage.com/track/click?u=6db8319d2eac54cf4264d03e9&amp;id=33f442c39c&amp;e=84b91cd7e7
Date: Mon, 29 Jul 2019 02:06:24 GMT
Connection: close

HTTP/1.1 200 OK
Server: openresty
Content-Type: text/html; charset=UTF-8
Vary: Accept-Encoding
X-UA-Compatible: IE=edge,chrome=1
Date: Mon, 29 Jul 2019 02:06:24 GMT
Content-Length: 0
Connection: close
Set-Cookie: _AVESTA_ENVIRONMENT=prod; path=/
Set-Cookie: _mcid=1.12dd4f7df9e81ee4b31e708f6cf42fce; expires=Tue, 28-Jul-2020 02:06:24 GMT; Max-Age=31536000; path=/; domain=.mailchimp.com

Request headers
================
HEAD /track/click?u=6db8319d2eac54cf4264d03e9&amp;id=33f442c39c&amp;e=84b91cd7e7 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: us2.list-manage.com
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.