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)

Why build this tool?

Email spoofing is a big threat to both individuals and organizations (Yahoo breach, …

bypass dkim dmarc email forge phishing attacks signatures spf spoofing spoofing emails testing tool