How to Use LDAP Accept/Routing Queries when Email Addresses Contain Separators?

Introduction

This document describes how to use Lightweight Directory Access Protocol (LDAP) accept or routing queries on the Cisco Email Security Appliance (ESA)/Cloud Email Security (CES) when email addresses contain separator characters.

How to Configure LDAP Accept or Routing Queries to Function when Email Addresses contain Separators?

In order to achieve this, use CLI and issue the command sievechar to activate the Sieve Email Filtering feature.

Note: Allowable characters are: - _ = + / ^ #

example.host> sievechar

Sieve Email Filtering is currently disabled.

Choose the operation you want to perform:
- SETUP - Set the separator character.
[]> setup

Enter the Sieve Filter Character, or a space to disable Sieve Filtering.
[]>+

Sieve Email Filter is enabled, using the '+' character as separator.
This applies only to LDAP Accept and LDAP Reroute Queries.

Choose the operation you want to perform:
- SETUP - Set the separator character.
[]>

This feature allows LDAP Accept/Routing queries to ignore the details that follow the defined separator on the ESA/CES.

An example of this feature is when an email contains the recipient address of mat+technicalsupport@cisco.com arrives into the ESA/CES where LDAP accept is configured, the LDAP accept query in question would send the query for mat@cisco.com and ignoring the +technicalsupport as per the sievechar setting to the LDAP server for validation.

Related Information

• Technical Support & Documentation - Cisco Systems
• Cisco Email Security Appliance - User Guides