hxxps://chrome[.]google[.]com/webstore/detail/mailtrack-for-gmail/ndnaehgpjlnokgebbaldlmgkapkpjkkb?hl=en

hxxps://chrome[.]google[.]com/webstore/detail/email-tracking-for-gmail/ndnaehgpjlnokgebbaldlmgkapkpjkkb

hxxps://www[.]forbes[.]com/sites/amyguttman/2015/12/21/our-secret-is-simplicity-europes-hottest-startups-share-the-secrets-of-their-success/#6df7963561fb

hxxp://www[.]computerworld[.]com/article/2979569/web-browsers/review-6-chrome-extensions-let-you-track-your-gmail[.]html?page=2#goto4

hxxps://www[.]nytimes[.]com/2015/11/19/technology/personaltech/foiling-electronic-snoops-in-email[.]html?_r=0

hxxp://www[.]pcworld[.]com/article/3017750/software-productivity/these-4-chrome-extensions-make-gmail-better-right-now[.]html

hxxps://www[.]buzzfeed[.]com/carolineodonovan/heres-how-i-can-tell-if-someone-read-my-email?utm_term=[.]cl3z9LXRX#[.]rrDR4nzMz

hxxps://www[.]ft[.]com/content/8b37a92b-15e6-4b9c-8427-315a8b5f4332