[Mailman-Users] Postfix error: "User unknown in virtual mailbox table"

[Peter]

I have seen this error on the net but I cannot locate the problem/solution:

Recipient address rejected: User unknown in virtual mailbox table;

I am having trouble with Postfix and Mailman integration.  I am using SQL 
lookups for virtual mailbox domains.  I believe my setup was working until I 
added the SQL part.

The following command yields no output:

$ postmap -q list at example.com hash:/var/spool/mailman/data/aliases

Finally, my setup:

$ postconf -n

alias_maps = hash:/etc/postfix/aliases, hash:/var/spool/mailman/data/aliases
biff = no
command_directory = /usr/local/sbin
config_directory = /etc/postfix
daemon_directory = /usr/local/libexec/postfix
debug_peer_level = 2
disable_vrfy_command = yes
empty_address_recipient = MAILER-DAEMON
html_directory = /usr/local/share/doc/postfix/html
mail_owner = _postfix
mailbox_size_limit = 1000000000
mailq_path = /usr/local/sbin/mailq
manpage_directory = /usr/local/man
message_size_limit = 80000000
mydomain = example.com
myhostname = mail.example.com
mynetworks = 127.0.0.0/8, 10.9.0.0/16, 192.168.0.0/16
myorigin = $mydomain
newaliases_path = /usr/local/sbin/newaliases
notify_classes = resource,software
queue_directory = /var/spool/postfix
queue_minfree = 120000000
readme_directory = /usr/local/share/doc/postfix/readme
relay_domains = hash:/etc/postfix/relay_domains
relayhost = smtp.isp.com
sample_directory = /etc/postfix
sendmail_path = /usr/local/sbin/sendmail
setgid_group = _postdrop
smtpd_banner = $myhostname ESMTP
smtpd_data_restrictions = reject_multi_recipient_bounce        
reject_unauth_pipelining
smtpd_helo_required = yes
smtpd_recipient_restrictions = reject_non_fqdn_recipient        
reject_non_fqdn_sender        reject_unknown_sender_domain        
permit_mynetworks        reject_unauth_destination        
reject_unknown_reverse_client_hostname        check_helo_access 
regexp:/etc/postfix/helo_checks        check_sender_mx_access 
cidr:/etc/postfix/bogus_mx        reject_rbl_client zen.spamhaus.org        
permit
unknown_local_recipient_reject_code = 550
virtual_alias_maps = mysql:/etc/postfix/sql/virtual_alias_maps.cf
virtual_gid_maps = mysql:/etc/postfix/sql/virtual_gid_maps.cf
virtual_mailbox_base = /var/spool/virtual_mailboxes
virtual_mailbox_domains = mysql:/etc/postfix/sql/virtual_mailbox_domains.cf
virtual_mailbox_limit = 80000000
virtual_mailbox_maps = mysql:/etc/postfix/sql/virtual_mailbox_recipients.cf
virtual_transport = maildrop
virtual_uid_maps = mysql:/etc/postfix/sql/virtual_uid_maps.cf


Thank you for any assistance.

Pedro