Cisco Cisco Email Security Appliance X1070 Mode D'Emploi

A message that is permanently undeliverable. This can happen during the SMTP 
conversation or afterward.

Host Access Table. The HAT maintains a set of rules that control incoming 
connections from remote hosts for a listener. Every listener has its own HAT. 
HATs are defined for public and private listeners, and contain mail flow policies 
and sender groups. 

Virus Definition File. An IDE file contains signatures or definitions used by 
anti-virus software to detect viruses.

Lightweight Directory Access Protocol. A protocol used to access information 
about people (including email addresses), organizations, and other resources in 
an Internet directory or intranet directory.

A listener describes an email processing service that will be configured on a 
particular IP interface. Listeners only apply to email entering the IronPort 
appliance — either from the internal systems within your network or from the 
Internet. IronPort AsyncOS uses listeners to specify criteria that messages must 
meet in order to be accepted and relayed to recipient hosts. You can think of a 
listener as an “email injector” or even a “SMTP daemon” running for each IP 
address you specify. 

IronPort AsyncOS differentiates between public listeners — which by default 
have the characteristics for receiving email from the Internet — and private 
listeners that are intended to accept email only from internal (groupware, 
POP/IMAP, and other message generation) systems. 

Creation of log files that monitor the performance of the IronPort appliance. The 
log files are stored in local disk(s) and can also be transferred and stored in a 
remote system. Typical attributes of a log subscription include: name, 
component to monitor (email operations, server), format, and transfer method.