In Today's last part of the episode..Sindoora saying to Chandramukhi, that tomorrow something is going to happen with Divya..Rajeev is listening their conversation.. uddenly Sindoora takes jug filled with water and pours in the vase..with crook looks on her face and the microfone goes dead..Rajeev cannot hear them..š
From above scene it is clear now..that Sindoora is the one sending all those anonymous letters to Divya..cos Rajeev is shown worried and thinking what she is gng to do tom with Divya?...so he is not the one...it is surely Sindoora..š”