Cisco Cisco Email Security Appliance C680 User Guide

These values are explained in 

If limits are applied per each Virtual Gateway address, you can still effectively implement system-wide 
limits by setting the Virtual Gateway limit to the system-wide limit you want divided by the number of 
possible virtual gateways. For example, if you have four Virtual Gateway addresses configured, and you 
do not want to open more than 100 simultaneous connections to the domain 

yahoo.com

, set the Virtual 

Gateway limit to 25 simultaneous connections.

The 

delivernow

 command, when acting on all domains, resets all counters tracked in the 

destconfig

 

command.

You can also configure the TLS (Transport Layer Security) on a per-domain basis. If the “Required” 
setting is specified, a TLS connection will be negotiated from the Cisco IronPort appliance listener to 
MTA(s) for the domain. If the negotiation fails, no email will be sent through the connection. For more 
information, see 

.

The maximum number of outbound connections that will be made by the Cisco 
IronPort appliance to a given host. (Note that the domain can include your internal 
groupware hosts.) 

The maximum number of messages allowed for a single outbound connection from the 
Cisco IronPort appliance to a given host before initiating a new connection.

The maximum number of recipients allowed within the given period of time. “None” 
denotes that there is no recipient limit for the given domain. 

The minimum period of time — between 1 and 60 minutes — that the Cisco IronPort 
appliance will count the number of recipients. Specifying a time period of “0” disables 
the feature. 

If you change the recipient limit, AsyncOS resets the counters for all messages 
already in the queue. The appliance delivers the messages based on the new 
recipient limit.

Specifies whether the limit will be applied (enforces) to the entire domain or to each 
mail exchange IP address specified for that domain. (Many domains have multiple MX 
records.) 

This setting applies to connection, message, and recipient limits.

Specifies whether the limit will be applied system-wide or for each Virtual Gateway 
address. 

If you have configured groups of IP addresses, but you have not configured 
virtual gateways, do not configure apply limits per each virtual gateway. This 
setting is intended only for systems configured to use virtual gateways. For 
information on configuring virtual gateways, see 

.