This search string is a Google Dork , a specialized search query designed to find specific types of sensitive data—in this case, email lists or lead databases from the year 2020. Breakdown of the Search Query
Based in Belgium, Mailfence offered a unique "Text Suite" in 2020. It integrated a plain-text editor for emails, removing the risk of tracking pixels. yahoo.com -hotmail.com -gmail.com -aol.com Txt 2020
: To identify data leaks or "dumped" information that has been inadvertently indexed by search engines. Malicious Actors This search string is a Google Dork ,