SMTP: Illegal MIME Type Encode
This protocol anomaly is an SMTP message that uses invalid mime encoding with the content-types multipart and message. The SMTP RFC specifies SMTP mime encoding as 7-bit, 8-bit, or binary when using using content-types that include other content-types, such as multipart and message.
References
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3