after a few discussion http://www.mail-archive.com/mailman-users@python.org/msg58378.html
i still am getting Jan 19 15:41:48 mail-server postfix/pipe[3724]: A502F19C8A57: to=<w...@mydomain.my>, relay=dovecot, delay=60040, delays=60002/36/0/2.1, dsn=4.3.0, status=deferred (temporary failure) postfix version: 2.5.9-5 OS: RHEL 5 64-bit here my main.cf configs ================= # postconf -n alias_database = hash:/etc/postfix/aliases alias_maps = hash:/etc/postfix/aliases, hash:/etc/mailman/aliases allow_min_user = no biff = no bounce_queue_lifetime = 1d broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 delay_warning_time = 0h disable_vrfy_command = yes enable_original_recipient = no home_mailbox = Maildir/ html_directory = no inet_interfaces = all inet_protocols = ipv4 local_recipient_maps = mail_name = iRedMail mail_owner = postfix mail_version = 0.6.1 mailbox_command = /usr/libexec/dovecot/deliver mailbox_size_limit = 15728640 mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man maximal_backoff_time = 4000s maximal_queue_lifetime = 1d minimal_backoff_time = 300s mydestination = $myhostname, localhost, localhost.localdomain, localhost.$myhostname mydomain = mydomain.my myhostname = mail-server.mydomain.my mynetworks = 127.0.0.0/8 mynetworks_style = subnet myorigin = mail-server.mydomain.my newaliases_path = /usr/bin/newaliases.postfix proxy_read_maps = $canonical_maps $lmtp_generic_maps $local_recipient_maps $mydestination $mynetworks $recipient_bcc_maps $recipient_canonical_maps $relay_domains $relay_recipient_maps $relocated_maps $sender_bcc_maps $sender_canonical_maps $smtp_generic_maps $smtpd_sender_login_maps $transport_maps $virtual_alias_domains $virtual_alias_maps $virtual_mailbox_domains $virtual_mailbox_maps queue_directory = /var/spool/postfix queue_run_delay = 300s readme_directory = /usr/share/doc/postfix-2.5.9/README_FILES recipient_bcc_maps = proxy:ldap:/etc/postfix/ ldap_recipient_bcc_maps_domain.cf, proxy:ldap:/etc/postfix/ ldap_recipient_bcc_maps_user.cf recipient_delimiter = + relay_domains = $mydestination, proxy:ldap:/etc/postfix/ ldap_relay_domains.cf relay_recipient_maps = proxy:mysql:/etc/postfix/ mysql_virtual_mailbox_maps.cf relayhost = [127.0.0.1] sample_directory = /usr/share/doc/postfix-2.5.9/samples sender_bcc_maps = proxy:ldap:/etc/postfix/ldap_sender_bcc_maps_domain.cf, proxy:ldap:/etc/postfix/ldap_sender_bcc_maps_user.cf sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_data_restrictions = reject_unauth_pipelining smtpd_enforce_tls = no smtpd_helo_required = yes smtpd_helo_restrictions = permit_mynetworks,permit_sasl_authenticated, check_helo_access pcre:/etc/postfix/helo_access.pcre smtpd_recipient_restrictions = reject_unknown_recipient_domain, reject_non_fqdn_recipient, reject_unlisted_recipient, check_policy_service inet:127.0.0.1:7777, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, check_policy_service inet:127.0.0.1:10031 smtpd_reject_unlisted_recipient = no smtpd_reject_unlisted_sender = yes smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = no smtpd_sasl_local_domain = smtpd_sasl_path = dovecot-auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_sender_login_maps = proxy:ldap:/etc/postfix/ldap_sender_login_maps.cf smtpd_sender_restrictions = permit_mynetworks, reject_sender_login_mismatch, permit_sasl_authenticated smtpd_tls_cert_file = /etc/pki/tls/certs/iRedMail_CA.pem smtpd_tls_key_file = /etc/pki/tls/private/iRedMail.key smtpd_tls_loglevel = 0 smtpd_tls_security_level = may tls_random_source = dev:/dev/urandom transport_maps = proxy:ldap:/etc/postfix/ldap_transport_maps_user.cf, proxy:ldap:/etc/postfix/ldap_transport_maps_domain.cf, hash:/etc/mailman/transport-mailman unknown_local_recipient_reject_code = 550 virtual_alias_maps = proxy:ldap:/etc/postfix/ldap_virtual_alias_maps.cf, proxy:ldap:/etc/postfix/ldap_virtual_group_maps.cf, proxy:ldap:/etc/postfix/ ldap_sender_login_maps.cf, proxy:ldap:/etc/postfix/ldap_catch_all_maps.cf virtual_gid_maps = static:502 virtual_mailbox_base = /var/vmail virtual_mailbox_domains = proxy:ldap:/etc/postfix/ ldap_virtual_mailbox_domains.cf virtual_mailbox_maps = proxy:ldap:/etc/postfix/ldap_virtual_mailbox_maps.cf virtual_minimum_uid = 502 virtual_transport = dovecot virtual_uid_maps = static:502 my master.cf: ========== http://pastebin.com/TmhWRZqd any hints and tips are welcomed.