===== LDAP based SMTP AUTH with Exim =====
  
//[[micha@dipper.info|Michael Dipper]] 03.02.2014//

The following configuration file needs to be added to ''/etc/exim4/conf.d/auth/40_exim4_config_ldap'':
  
  BASEDN=dc=dipper,dc=info
  USERDN=${lookup ldapdn{ldap:///BASEDN?dn?sub?uid=${quote_ldap:$1} }}

  ldap_login:
   driver = plaintext
   public_name = LOGIN
   server_prompts = Username:: : Password::
   server_condition = ${if ldapauth {user="USERDN" pass=${quote_ldap:$2} ldap://localhost/}{yes}{no}}
   server_set_id = ${sg{$ldap_dn}{\s+}{}}
   server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}}
   
After the file has been created a refresh of exim config is required, followed by a restart:

  update-exim4.conf