Once you have the settings window open, just click on the email settings link as shown below bottom left.
Known Issue With Google Accounts
If you have set up your email credentials correctly with the cTrader platform and the emails are failing to be sent with your automated trading system, indicator or trading software than there is a high chance that your email provider is blocking the cTrader application, this blog will help you unblock a GMAIL account.
How To Test Your Email Settings Are Correct
Once you have configured your email settings in cTrader the simplest way to test if they will work with any cBot, indicator and trading software that you have downloaded is to download and install the cTrader Email Test Tool on this page, just add it to your shopping cart and checkout, it is free to use.