From there you will be able to see all the apps that now have access to your Google account, and you can remove some of them if you no longer use them or if you're not comfortable with it. That meant millions of personal messages that should have been deleted were passing through to Return Path's servers, the person says.
It added that some developers had been denied access to Gmail as they failed to meet specific criteria outlined in Google's verification process, including not asking for permissions the apps will not use.
"Some people might consider that to be a dirty secret", Mr Loder told the Wall Street Journal. There's no doubt that some of the actions described, such as having employees read users' emails to train machine learning algorithms, are cause for alarm. "My only advice is be aware if something is over email and it's a free account - especially like Gmail - somebody potentially can have access to it". For instance, the Security Checkup shows all non-Google apps that have access to your data and flags potentially risky apps so you can revoke any previously-granted permissions that you are no longer comfortable with.
As per a report by Business Insider, software developed by third parties are able to scan and read your Gmail, apparently without much restriction from Google. What is unclear is how closely these outside developers adhere to their own agreements and whether Google does anything to ensure they do.
To recall, Google back in 2017, said its computers will soon stop reading the emails of its Gmail users to personalise their ads.
Several companies such as Edison Software and eDataSource Inc have confirmed they had read emails in order to improve their services.
Companies must put pressure on developers to change their habits or policies on the data they access.
The Wall Street Journal spoke to a number of companies that said they had read people's emails. According to the report, hundreds of outside developers are being allowed by Google to scan the inboxes of users who have previously signed up for newsletters on various websites.
"We strongly encourage you to review the permissions screen before granting access to any non-Google application", the Internet giant suggested.
The search giant also said it vets third-party apps to make sure they "only request relevant data" and "accurately represent themselves".