Validity Blog
Inbox Expo: How Philips Went from Inbox Zero to Email Hero
https://www.validity.com/inbox-expo-how-philips-went-from-inbox-zero-to-email-hero/
Yahoo Finance

https://finance.yahoo.com/news/emailexperts-2021-netcore-inbox-expo-225000597.html
CNBC KPVI

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NewsAnyway
Fox 34
