From: Ian Clancy (ClancyIancel.ie)
Date: Wed Dec 01 2004 - 17:05:18 CST

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Greeting postfix users,
I have setup a postfix (2.1.5) smtp gateway that relays mail to an internal
postfix server. User information is stored on a openldap server within the
network. What i am attempting to do is bounce emails at the gateway server
that are addressed to users that do not exist on the internal ldap
directory. I am using amavisd-new as a content filter.

Here is my gateway main.cf :

---------------------------------------
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
mail_owner = postfix
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain
local_recipient_maps = ldap:ldaplocal
unknown_local_recipient_reject_code = 550
relay_domains = $mydestination, mydomain.com
alias_maps = hash:/etc/aliases
debug_peer_level = 2
debugger_command =
         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
         xxgdb $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.1.15/samples
readme_directory = /usr/share/doc/postfix-2.1.15/README_FILES
alias_database = hash:/etc/aliases
myorigin = $myhostname
mydomain = mydomain.com
mynetworks = 192.168.0.0/16, 127.0.0.0/8
biff = no
smtpd_banner = fw.mydomain.com ESMTP
queue_minfree = 20480000
message_size_limit = 5012000
transport_maps = hash:/etc/postfix/transport
smtpd_helo_required = yes
content_filter = smtp-amavis:[localhost]:10024
notify_classes = resource, software, policy
ldaplocal_server_host = ldapmaster.bp
ldaplocal_search_base = ou=People,dc=mydomain,dc=org
ldaplocal_query_filter = (uid=%s)
ldaplocal_result_attribute = uid

--------------------------------------------------------

also, my transport file contains the following line instructing postfix to
relay mail to the internal server.
---------------------------------------------------------
celczech.cz smtp:[192.168.2.2]
---------------------------------------------------------

I know that the ldap lookups are working as the following command returns a
string :

postmap -q 'clancyian' ldap:ldaplocal

or if i choose to enter a user that does not exist then no string is
returned.

Am i missing something in my main.conf ?. How do i explicity tell postfix to
reject these users which do not exist ?. I have tried disabling the
amavisd-new content filter but this does not make any difference.

Thanks in advance for any help.
regards,
Ian Clancy

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