Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

“Black hole” listeners allow you to test your message generation systems, and to also get a rough 
measure of receiving performance. Two types of black hole listeners are queueing and non-queueing. 

The queueing listener saves the message to the queue, but then immediately deletes it. The non-queueing 
listener accepts a message, and then immediately deletes it without saving it.

Use a queuing listener when you are interested in measuring the performance of the entire injection 
portion of your message generation system. Use the non-queueing listener when you want to 
troubleshoot the connection from your message generation system to the appliance. 

For example, in 

, you could create a black hole listener “C” to mirror the private listener 

labeled “B.” A non-queueing version tests the performance path of the system from the groupware client 
to the groupware server to the appliance. A queueing version tests that same path and the appliance’s 
ability to enqueue messages and prepare them for delivery via SMTP. 

 - admin@ironport.com

Final Message Content:

Received: from remotehost.example.com (HELO TEST) (1.2.3.4)

  by stacy.qa with TEST; 19 Oct 2004 00:54:48 -0700

Message-Id: <3i93q9$@Management>

X-IronPort-AV: i="3.86,81,1096873200";

   d="scan'208"; a="0:sNHT0"

Subject: hello

This is a test message.

Run through another debug session? [N]>