What is 2FA (Two-Factor Authentication) in email security?
Two-factor authentication requires two different authentication types: something you know (password) plus something you have (phone, security key) or something you are (biometrics). Compromise of one factor isn't sufficient for access.
Email **2FA** typically uses: SMS codes (least secure, SIM swap vulnerable), authenticator apps (time-based codes), or hardware security keys (most secure). Most email providers support multiple **2FA** methods.
**2FA** significantly reduces **account takeover** risk. Even stolen passwords don't enable access without the second factor. Enable **2FA** on all email accounts, especially those used for business or sensitive communications.
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