Free email tracking software for Gmail users

MailTrack is an application that allows Gmail users to identify new messages and those which have already been opened. This is often beneficial for those who receive a substantial number of mails on a daily basis (such as managers of an organisation). Email tracking reports, daily reminders and line tracking are a few features associated with the basic (free) version. Upgrading to the professional variant will provide even more possibilities. The entire size of the app is only 1.2 megabytes.