After what comes next maybe it's time to call it quits Internet. Exaggeration but with a grain of truth.
There is a Google extension Chrome called Streak. Once this extension is installed, it will allow you to see when exactly someone read an email you sent them. This means today that Streak users will be able to see if their emails have been opened and have not been answered.
The plugin is free and quite easy to use installation. Μόλις το κατεβάσετε και δώσετε πρόσβαση στο λογαριασμό σας στο Gmail, θα ξεκινήσει αυτόματα αρχίσει να παρακολουθεί τα εξερχόμενα messages.
Below it seems to present an email you sent. A small window in the top right corner of the envoy presents it as a closed email:
Here is the time when someone opens the e-mail
If you send a message to multiple recipients, Streak will tell you how many people have read it but will not reveal their identity:
Streak is known from 2012, but reading proof was added in November. It is released as a plugin, just for it Google Chrome and Safari.