=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Content-Type: image/png
Content-Length: 36040
Connection: close
Date: Fri, 03 Dec 2021 09:19:04 GMT
Last-Modified: Mon, 12 Jan 2015 16:54:33 GMT
ETag: &quot;b12116cd3a2b72cda469878c31268256&quot;
Expires: Thu, 09 Jan 2025 16:54:32 +0000
Accept-Ranges: bytes
Server: AmazonS3
X-Cache: Miss from cloudfront
Via: 1.1 e8bb727bbf7c462b3ab90d9119c37b45.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: NRT20-C4
X-Amz-Cf-Id: NxFbbY9hgkeqYDgK1ZbWeJb5Vbk83w0PXQ6MDCzWPV2npV8MvhzI3A==

Request headers
================
HEAD /images/2015/01/mailtrack1.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.