1) Make sure NetworkManager is installed
2) add
export PYTHONPATH="${PYTHONPATH}:/home/user/Documents/rasp" #"rasp" is the module containing python-function for sending the mail
export EMAIL_USR="[email protected]"
export EMAIL_PWD="strong_password" to ~/.profile
3)
go to /etc/NetworkManager/dispatcher.d and add the send_mail file here.