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What You'll Learn Today:

SMTP Smuggling

How cybercriminals evade email filter protection.

Silent Threat

What is SMTP Smuggling?:

  • SMTP (Simple Mail Transfer Protocol) serves as the backbone of email communication.
  • Cybercriminals exploit SMTP by manipulating end-of-data sequences during email transmission, enabling the transmission of impersonated emails.

Impersonation Attacks and Vulnerability:

  • Impersonation attacks are facilitated by SMTP smuggling.
  • Unaware recipients are susceptible to falling prey to this social engineering scam, emphasizing the need for recognizing and preventing SMTP smuggling via awareness training.

Security Measures and Collaboration:

  • Some providers, like Microsoft, have deployed patches to address the threat, while others may still be exposed.
  • Organizations should prioritize comprehensive security awareness training, leveraging holistic platforms like PhishingBox.
  • Collaborative efforts between security researchers, industry players, organizations, and end users enhance awareness and enact proactive security measures.

Question Icon

What is SMTP Smuggling?:

  • SMTP (Simple Mail Transfer Protocol) serves as the backbone of email communication.
  • Cybercriminals exploit SMTP by manipulating end-of-data sequences during email transmission, enabling the transmission of impersonated emails.

Question Icon

Impersonation Attacks and Vulnerability:

  • Impersonation attacks are facilitated by SMTP smuggling.
  • Unaware recipients are susceptible to falling prey to this social engineering scam, emphasizing the need for recognizing and preventing SMTP smuggling via awareness training.

Question Icon

Security Measures and Collaboration:

  • Some providers, like Microsoft, have deployed patches to address the threat, while others may still be exposed.
  • Organizations should prioritize comprehensive security awareness training, leveraging holistic platforms like PhishingBox.
  • Collaborative efforts between security researchers, industry players, organizations, and end users enhance awareness and enact proactive security measures.

SMTP smuggling is a significant, often overlooked threat in email security. It poses a severe risk by evading traditional email security measures like SPF, DKIM, and DMARC.

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