POP3: Failure Command Failed
This protocol anomaly triggers when it detects a response from a POP3 server indicating that a POP3 command has failed. This can indicate a non-standard client or server or a command-line access to a POP3 server by an attacker.
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