Read the original article at https://blog.knowbe4.com/smtp-smuggling-email-security-impersonation
A newly-discovered technique misusing SMTP commands allows cybercriminals to pass SPF, DKIM and DMARC checks, empowering impersonated emails to reach their intended victim.
Read the original article at https://blog.knowbe4.com/smtp-smuggling-email-security-impersonation