800+ Million Emails Leaked Online by Email Verification Service

On February 25th, 2019, I discovered a non-password protected 150GB-sized MongoDB instance. This is perhaps the biggest and most comprehensive email database I have ever reported. Upon verification I was shocked at the massive number of emails that were publicly accessible for anyone with an internet connection. Some of data was much more detailed than just the email address and included personally identifiable information (PII).
Read more: https://securitydiscovery.com/800-million-emails-leaked-online-by-email-verification-service/?source=Snapzu