User LDAP attributes for pipe channel processing

When the MTA finds a user entry in LDAP that has a  attribute  (or whatever LDAP attribute is named by the   MTA option) value of , the   MTA option&#x27;s   clause defines this to mean (by default) to route the message to the pipe channel with the address composed of the user&#x27;s    value and the value of the user&#x27;s    LDAP attribute (or whatever attribute is named by the   MTA option), i.e.,  uid@mailProgramDeliveryInfo.

The definition of what that  value means is controlled by Pipe options.

See also:
 * Pipe options
 * ldap_delivery_option MTA Option
 * delivery_options MTA Option
 * ldap_program_info MTA Option
 * Pipe channel addressees and their handling