catchall with relay_recipient_maps

2 msg	postmap header_checks error
10 msg	mailbox_command (dovecot lda) stopped working, ...
5 msg	mynetworks via LDAP lookup
7 msg	Local recipient table in LDAP problem
2 msg	proxy_read_maps
1 msg	smtpd_restriction_class and it's lookup
8 msg	Message Rejected
12 msg	Customize to filter attachment ?
2 msg	Relay question
14 msg	unnecessary routing?
4 msg	do not use 'reject_maps_rbl'?
9 msg	Fwd: Postfix in OpenVZ.
2 msg	bypass body_checks for local mail?

catchall with relay_recipient_maps
\ Rajkumar S (23 Jan 2008)
. \ Noel Jones (23 Jan 2008)
. . \ Magnus Bäck (23 Jan 2008)
. . . \ Rajkumar S (24 Jan 2008)

4 msg	'Name server failure' is output
3 msg	smtp_sasl_password_maps lookups
16 msg	Postfix Queues on a Ram Disk
15 msg	sendmail compared to smtp sending
3 msg	Postfix does not recognize remote emails
2 msg	How to disable SSLv2 on smtpd opportunistic TLS?

Subject:	catchall with relay_recipient_maps
Group:	Postfix-users
From:	Rajkumar S
Date:	23 Jan 2008

Hello,

I am running a "smart host" mail server which acts as mx and forwards
mails to real mail server (running qmail-ldap). I have enabled
relay_recipient_maps to check with real mail server's ldap so that
unknown users can be dropped. every thing is working except for
catchall.

In qmail-ldap if an account has mailAlternateAddress or mail as
catchall then that account will accept mails for all
unknown mail ids. This creates problems for relay_recipient_maps,
because catchall is a "magic" value in qmail-ldap.

Thus if a domain has a mail account as catchall
relay_recipient_maps should allow all mails regardless of whether the
particular email id is present or not. How can I implement this
configuration in postfix?

Thanks and regards,

raj

postconf -n
--------------
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
config_directory = /etc/postfix
mydestination = $myhostname
myhostname = smtp-tvm.mydomain.com
mynetworks = 127.0.0.0/8
myorigin = $mydomain

relay_domains = hash:/etc/postfix/rcpthosts
relay_recipient_maps = ldap:/etc/postfix/relay_recipients
transport_maps = hash:/etc/postfix/smtproutes

smtpd_recipient_restrictions = reject_unknown_sender_domain,
permit_mynetworks,
reject_non_fqdn_sender,
reject_unauth_destination,
reject_non_fqdn_hostname,
reject_invalid_hostname,
permit

cat /etc/postfix/relay_recipients
---------------------------------------
server_host = ldap://127.0.0.1
bind = no
search_base = o=isp
query_filter = (&(objectClass=qmailUser)(|(mail=%s)(mailAlternateAddress=%s)))
result_attribute = mail,mailAlternateAddress