=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Date: Sun, 14 Apr 2019 03:12:53 GMT
Content-Type: image/png
Content-Length: 4052
Connection: close
Last-Modified: Thu, 11 Apr 2019 14:15:38 GMT
ETag: &quot;5caf4c0a-fd4&quot;
X-Type: static/known
Cache-Control: public, max-age=2592000
Vary: Accept-Encoding
Access-Control-Allow-Origin: *
Accept-Ranges: bytes
Server: NetDNA-cache/2.2
X-Cache: MISS

Request headers
================
HEAD /wp-content/uploads/2015/06/CLTV-equation.png HTTP/1.1
Host: cdn.apptamin.com
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Accept: */*
Referer: https://itxdesign.com
Connection: close


Link is valid.