EXECUTIVE SUMMARY:
Recently discovered vulnerabilities in outbound SMTP servers expose weaknesses in the email authentication protocols, allowing authenticated users and trusted networks to send emails with spoofed sender information. These vulnerabilities exploit flaws in Sender Policy Framework (SPF) and Domain Key Identified Mail (DKIM) and circumvent Domain-based Message Authentication, Reporting, and Conformance (DMARC), enabling attackers to impersonate email identities within hosted domains. The exploitation of these vulnerabilities could lead to widespread email impersonation, causing significant reputational and financial harm to organizations. As of now, there are no specific patches listed for these vulnerabilities.