Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Submit and commit your changes.

If you use an LDAP routing query to route mail to a different mail host, AsyncOS uses the Alternate 
Mailhost Attribute to determine the SMTP server to query. However, there are cases where you may not 
want that to occur. For example, in the following schema, note that the mail host attribute (

mailHost

) 

has a different SMTP address than the servers listed in the call-ahead SMTP server attribute 
(

callAhead

):

dn: mail=cisco.com, ou=domains

mail: cisco.com

mailHost: smtp.mydomain.com

policy: ASAV

callAhead: smtp2.mydomain.com,smtp3.mydomain.com:9025

In this case, you can use the SMTP Call-Ahead field to create a routing query that directs the SMTP 
call-ahead query to the servers listed in the 

callAhead

 attribute. For example, you might create a routing 

query with the following attributes:

In this query, the 

{d}

 represents the domain part of the recipient address, and the SMTP Call-Ahead 

Server Attribute returns the values for the call-ahead servers and the port that should be used for the 
query: smtp2.mydomain.com, smtp3.mydomain.com on port 9025.