NoSpoofing
What is NoSpoofing?
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Extension summary
Email UI rendering is a significant part that affects the users’ perception of an email’s authenticity. However, most of the web mails and email clients we tested do not display SPF, DKIM, or DMARC authentication results explicitly. Thus, it is difficult for ordinary users to fully understand the details of email authentication.
An effective defense method is to provide a user-friendly UI notification, which alerts users that the emails they receive may be spoofing. This extension is such an UI notification.
Usage: Users can click the icon of the extension when reading an email. Then the web UI will show whether the email is safe or not. If users want to know the details of this email, they can click the notification message.
User reviews
Akshat Kharbanda, 2021-06-16 
默小西, 2020-09-23Extension safety
Risk impact
NoSpoofing requires very minimum permissions.
Risk likelihood
NoSpoofing has earned a fairly good reputation and likely can be trusted.
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