Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

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 appliance listener to MTA(s) for the 
domain. If the negotiation fails, no email will be sent through the connection. For more information, see 

.

You can specify whether the appliance sends an alert if the TLS negotiation fails when delivering 
messages to a domain that requires a TLS connection. The alert message contains name of the destination 
domain for the failed TLS negotiation. The appliance sends the alert message to all recipients set to 
receive Warning severity level alerts for System alert types. You can manage alert recipients via the 
System Administration > Alerts page in the GUI (or via the 

alertconfig

 command in the CLI).

To enable TLS connection alerts, click Edit Global Settings on the Destination Controls page or 

destconfig -> setup

 subcommand. This is a global setting, not a per-domain setting. For information 

on the messages that the appliance attempted to deliver, use the Monitor > Message Tracking page or the 
mail logs.

You must specify a certificate to use for all outgoing TLS connections. Use the Edit Global Settings on 
the Destination Controls page or 

destconfig -> setup

 subcommand to specify the certificate. For 

information on obtaining a certificate, see 

.

For more information on alerts, see the “System Administration” chapter.

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 

.