Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Alerts sent from the appliance to addresses specified in the System Administration > Alerts page (or the 

alertconfig

 command) follow SMTP Routes defined for those destinations. 

Incoming: if one message has 10 recipients and they are all on the same Exchange server, AsyncOS will 
open one TCP connection and present exactly one message to the mail store, not 10 separate messages.

Outgoing: works similarly, but if one message is going to 10 recipients in 10 different domains, AsyncOS 
will open 10 connections to 10 MTAs and deliver them one email each.

Splintering: if one incoming message has 10 recipients and they are each in separate Incoming Policy 
groups (10 groups), the message will splinter even if all 10 recipients are on the same Exchange server. 
Thus, 10 separate emails will be delivered over a single TCP connection.

If an Outbound SMTP Authentication profile has been created, you can apply it to an SMTP Route. This 
allows authentication for outgoing mail in cases where the appliance sits behind a mail relay server that 
is at the edge of the network. For more information about Outbound SMTP Authentication, see 

.

Use the Network > SMTP Routes page to manage SMTP Routes on your appliance. You can add, modify, 
and delete mappings in the table. You can export or import the SMTP Routes entries.

Click Add Route on the Network > SMTP Routes page. 

Enter a receiving domain. This can be a hostname, domain, IPv4 address, or IPv6 address.

Enter a destination host. This can be a hostname, IPv4 address, or IPv6 address. You can add multiple 
destination hosts by clicking Add Row and entering the next destination host in the new row.

You can specify a port number by adding “:<port number>” to the destination host: 

example.com:25.