=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 308 Permanent Redirect
Server: nginx/1.15.8
Content-Type: text/html
Content-Length: 171
Location: https://www.addthis.com/bookmark.php?v=250&amp;pub=sigeos15
Date: Fri, 26 Nov 2021 13:15:33 GMT
Connection: close

HTTP/1.1 200 OK
Server: nginx/1.15.8
Content-Type: text/html
X-Powered-By: PHP/5.5.9-1ubuntu4.6
Cache-Tag: addthis-site
Surrogate-Key: addthis-site
Strict-Transport-Security: max-age=15724800; includeSubDomains
Date: Fri, 26 Nov 2021 13:15:33 GMT
Connection: close

Request headers
================
HEAD /bookmark.php?v=250&amp;pub=sigeos15 HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: www.addthis.com
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.