Cisco Cisco Email Security Appliance C160 Mode D'Emploi

To configure bypassing LDAP acceptance queries via the CLI, answer yes to the 
following question when you enter recipients using the 

listenerconfig -> edit 

-> rcptaccess

 command: 

When you configure a RAT entry to bypass LDAP acceptance, be aware that the 
order of RAT entries affects how recipient addresses are matched. The RAT 
matches the recipient address with the first RAT entry that qualifies. For example, 
you have the following RAT entries: postmaster@ironport.com and ironport.com. 
You configure the entry for postmaster@ironport.com to bypass LDAP 
acceptance queries, and you configure the entry for ironport.com for ACCEPT. 
When you receive mail for postmaster@ironport.com, the LDAP acceptance 
bypass will occur only if the entry for postmaster@ironport.com is before the 
entry for ironport.com. If the entry for ironport.com is before the 
postmaster@ironport.com entry, the RAT matches the recipient address to this 
entry and applies the ACCEPT action.

For all public listeners you create, by default, the RAT is set to reject email from 
all recipients: 

In the Recipient Access Table Overview listing, the default entry is named “All 
Other Recipients.”

By default, the RAT rejects all recipients so that you do not accidentally create an 
open relay on the Internet. An open relay (sometimes called an “insecure relay” 
or a “third-party” relay) is an SMTP email server that allows third-party relay of 
email messages. By processing mail that is neither for — nor from — a local user, 
an open relay makes it possible for an unscrupulous sender to route large volumes 
of spam through your gateway. Use caution when changing the default values of 
Recipient Access Tables for public listeners you create. 

You can not delete the default “ALL” entry from the RAT.

Would you like to bypass LDAP ACCEPT for this entry? [Y]>

 y

ALL

REJECT