=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Content-Type: image/png
Content-Length: 12976
Connection: close
Date: Fri, 03 Dec 2021 08:17:33 GMT
Last-Modified: Mon, 12 Jan 2015 16:54:34 GMT
ETag: &quot;59351e9878aa2710597a7838e5f029a8&quot;
Expires: Thu, 09 Jan 2025 16:54:33 +0000
Accept-Ranges: bytes
Server: AmazonS3
X-Cache: Miss from cloudfront
Via: 1.1 ac29bb311f500a945f9bc1e41cde55cf.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: NRT12-C2
X-Amz-Cf-Id: UT-WoSwDWy-UaRyb2DoWJMbEmjMs6Ptb6CQsuygW38MnIN_QVsHBLA==

Request headers
================
HEAD /images/2015/01/mailtrack3.png HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: cdn.zako.org
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.