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Espoofer - An Email Spoofing Testing Tool That Aims To Bypass SPF/DKIM/DMARC And Forge DKIM Signatures
espoofer is an open-source testing tool to bypass SPF, DKIM, and DMARC authentication in email systems. It helps mail server administrators and penetration testers to check whether the target email server and client are vulnerable to email spoofing attacks or can be abused to send spoofing emails.
Figure 1. A case of our spoofing attacks on Gmail (Fixed, Demo video)