Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Uncontrolled high-volume email delivery can overwhelm recipient domains. AsyncOS gives you full 
control of message delivery by defining the number of connections your appliance will open or the 
number of messages your appliance will send to each destination domain.

Using the Destination Controls feature (Mail Policies > Destination Controls in the GUI, or the 

destconfig

 command in the CLI), you can control:

Concurrent Connections: number of simultaneous connections to remote hosts the appliance will 
attempt to open.

Maximum Messages Per Connection: number of messages your appliance will send to a destination 
domain before the appliance initiates a new connection.

Recipients: number of recipients the appliance will send to a given remote host in a given time 
period.

Limits: how to apply the limits you have specified on a per-destination and per MGA hostname 
basis.

Whether TLS connections to remote hosts will be accepted, allowed, or required (see 

).

Whether to send an alert when TLS negotiation fails when delivering a message to a remote host that 
requires a TLS connection. This is a global setting, not a per-domain setting.

Assign a TLS certificate to use for all outbound TLS connections to remote hosts.

Whether or not to perform address tagging via Bounce Verification (see 

Which bounce profile should be used by the appliance for a given remote host (the default bounce 
profile is set via the Network > Bounce Profiles page).

You can also control the default settings for unspecified domains.