CVE-2024-3400: PAN-OS Command Injection Vulnerability in GlobalProtect Gateway. Learn More
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A mail loop between SEG and Exchange can occur when the Exchange server is configured to "forward mail with unresolved recipients" (Exchange 2003). A similar problem can occur when the Exchange organization includes more than one Exchange server and messages are routed between servers.
Directory Harvest Attacks and randomly addressed spam can trigger a larger volume of looping mail and cause more visible symptoms.
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