Hi guys, I have several mail servers running postfix 2.4/2.5 with postfixadmin and mysql as backend and dovecot for imap/pop3. I can access the inbox from outside the office using Outlook/Thunderbird but whenever I tried to send an outside email even to an internal user I always get a "Mail Undeliverable Error", but when webmail is used by the user there is no problem (to rule out dns misconfiguration). I'm already stumped for two days now and I can't figure it out.
Need help. Here's the output of my postconf -n : postconf -n alias_database = hash:/etc/postfix/aliases alias_maps = hash:/etc/postfix/aliases broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix debug_peer_level = 2 header_checks = regexp:/etc/postfix/header_checks html_directory = /usr/share/doc/postfix-2.4.7-documentation/html inet_interfaces = all mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man maps_rbl_domains = bl.spamcop.net message_size_limit = 40960000 mydestination = localhost mydomain = ddblocal.com myhostname = mail.ddblocal.com mynetworks = 192.168.0.0/22, 127.0.0.0/8 myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.4.7-documentation/readme recipient_delimiter = + relay_domains = $mydestination sample_directory = /etc/postfix sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_recipient_restrictions = permit_sasl_authenticated permit_mynetworks reject_unauth_destination permit_tls_all_clientcerts reject_non_fqdn_hostname reject_non_fqdn_sender reject_non_fqdn_recipient reject_unauth_destination reject_unauth_pipelining reject_invalid_hostname reject_unknown_sender_domain reject_rbl_client sbl-xbl.spamhaus.org reject_rbl_client zen.spamhaus.org reject_rhsbl_sender dsn.rfc-ignorant.org reject_rbl_client bl.spamcop.net permit smtpd_sasl_auth_enable = yes smtpd_sasl_exceptions_networks = $mynetworks smtpd_sasl_path = /var/run/dovecot/auth-client smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_tls_cert_file = /etc/postfix/ssl/mail-cert.pem smtpd_tls_key_file = /etc/postfix/ssl/mail-key.pem smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_security_level = may smtpd_tls_session_cache_database = btree:/var/spool/postfix/smtpd_tls_session_cache smtpd_tls_session_cache_timeout = 3600s tls_random_source = dev:/dev/urandom transport_maps = hash:/etc/postfix/transport unknown_local_recipient_reject_code = 550 virtual_alias_maps = proxy:mysql:$config_directory/ mysql_virtual_alias_maps.cf virtual_gid_maps = static:12 virtual_mailbox_base = /home/virtualmail virtual_mailbox_domains = proxy:mysql:$config_directory/ mysql_virtual_domains_maps.cf virtual_mailbox_maps = proxy:mysql:$config_directory/ mysql_virtual_mailbox_maps.cf virtual_minimum_uid = 150 virtual_transport = dovecot virtual_uid_maps = static:150 TIA. Jan