=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Content-Type: image/png
Content-Length: 32398
Connection: close
Date: Fri, 03 Dec 2021 08:17:00 GMT
Last-Modified: Mon, 12 Jan 2015 16:54:32 GMT
ETag: &quot;eb0af875823aa4c9e887d9b94538ac5f&quot;
Expires: Thu, 09 Jan 2025 16:54:31 +0000
Accept-Ranges: bytes
Server: AmazonS3
X-Cache: Miss from cloudfront
Via: 1.1 d3d9dad2af73f55ca535e5ee799f7ad8.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: NRT12-C2
X-Amz-Cf-Id: yvh-ChntTpNePQ8D_DaTlIl9AyFNAMEguofHnGRYj78rtb9nBg8kDw==

Request headers
================
HEAD /images/2015/01/mailtrack.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.