What is an Email OTP?
An Email OTP (One-Time Password) is a temporary code sent to a user’s email address for authentication purposes. It’s a popular way to confirm a user’s identity during login, signup, or sensitive actions like password resets and financial transactions.
What is the purpose of an Email OTP?
The main purpose of an Email OTP is to add a layer of security beyond a username and password. Since the code is delivered to the user’s email inbox and expires after a short time (usually 5–15 minutes), it makes unauthorized access more difficult. It’s widely used in two-factor authentication (2FA) flows.
Is Email OTP secure?
Email OTPs are generally secure when paired with a strong password and a secured email account. However, they can be vulnerable if the user’s email is compromised or not protected with 2FA. Compared to SMS OTPs, email can be less susceptible to SIM-swapping attacks but more exposed to phishing.
Email OTP vs SMS OTP – which is better?
It depends on your threat model. SMS OTPs are more prone to interception through SIM swapping and mobile network vulnerabilities. Email OTPs avoid those issues but rely on the strength of the email account’s security. For best results, both methods should be combined with device-based authentication or app-generated OTPs (like Google Authenticator).
Can Email OTPs be automated or bypassed?
Some bots and attackers try to bypass email OTPs through phishing or by exploiting weak verification flows. That’s why modern security practices recommend pairing OTPs with CAPTCHA, rate-limiting, and device fingerprinting. Additionally, sending OTPs from a verified domain improves deliverability and builds user trust.
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