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 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 

.

You can specify whether the IronPort 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 IronPort 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 of the 
Cisco IronPort AsyncOS for Email Configuration Guide.