Cisco Cisco Email Security Appliance C170 Mode D'Emploi

Name of the call-ahead server profile.

Choose from one of the following methods for connecting to the call-ahead 
server:

Use Delivery Host. Select this option to specify that the host for the 
delivery email address is used for the SMTP call-ahead query. For 
example, if the mail recipient address is recipient@example.com, the 
SMTP query is executed against the SMTP server associated with 
example.com. If you have configured SMTP routes or LDAP routing 
queries, these routes are used to determine the SMTP server to query. 
For details about configuring LDAP routing queries, see 

Static Call-Ahead Server. Use this option to create a static list of 
call-ahead servers to query. You may want to use this option if you do 
not expect the names and locations of the call-ahead servers to change 
often. When you use this option, the Email Security appliance queries 
the hosts in a round-robin fashion, starting with the first static 
call-ahead server listed. 

Note that when you choose the static call-ahead server type, no 
SMTP routes are applied to the query. Instead an MX lookup is 
performed, and then an A lookup is performed on the hosts to 
obtain the call-ahead IP addresses for the static servers. 

If you choose to use the static call-ahead server type, enter a list of host and 
port combinations in this field. List the server and port using the following 
syntax:

ironport.com:25

Separate multiple entries with a comma.