The symbol to watch out for is a red padlock. This symbol may have a line through it or show the lock as open.
It means someone else might be able to read the information in the email. The lock represents a feature called “Transport Layer Security.”
Google explains: “When possible, Gmail protects your info by automatically encrypting your emails, which turns them into a code during delivery.
“This security tool is called Transport Layer Security (TLS) and helps prevent others from reading your emails.”
It adds: “If you’re on a computer or an Android device, emails that aren’t protected by this security tool will show No TLS.
“This icon looks like an open red lock and means that someone else might be able to read the email.”
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