Dear all, I am a newbie in Postfix. I have successfully installed postfix in ubuntu refers the tutorials: https://help.ubuntu.com/community/Postfix
now I could send mail internally, but could not send mail to the outside (gmail.com, yahoo.com, etc). the Mail Delivery Status Report is as follows: ------------------------- The mail system <x...@gmail.com>: unknown user: "xxx" [-- Attachment #2: Delivery report --] [-- Type: message/delivery-status, Encoding: 7bit, Size: 0.3K --] Reporting-MTA: dns; xxx.cewit.stonybrook.edu X-Postfix-Queue-ID: BA73BA070A X-Postfix-Sender: rfc822; r...@xxx.cewit.stonybrook.edu Arrival-Date: Tue, 19 Oct 2010 14:25:22 -0700 (PDT) Final-Recipient: rfc822; x...@gmail.com Action: failed Status: 5.1.1 Diagnostic-Code: X-Postfix; unknown user: "xxx" ------------------------- It seems the error msg was sent from your local host instead of gmail.com I already tries to "Indirect delivery via the local delivery agent" refers to:http://www.postfix.org/MAILDROP_README.html. BTW, my ubuntu is a vm, and i use port mapping (25 and 587) to connect to the out side. Thank you for your help. Output of "postconf -n": alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes config_directory = /etc/postfix home_mailbox = Mail/ inet_interfaces = all inet_protocols = all mailbox_command = /usr/bin/maildrop -d ${USER} mailbox_size_limit = 0 mydestination = hash:/etc/postfix/mydomains myhostname = xxx.cewit.stonybrook.edu mynetworks = 192.168.1.0/24 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relay_domains = lists.xxx.cewit.stonybrook.edu relayhost = smtp_sasl_auth_enable = no smtp_tls_note_starttls_offer = yes smtp_tls_security_level = may smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = smtpd_sasl_security_options = noanonymous smtpd_tls_CAfile = /etc/ssl/certs/cacert.pem smtpd_tls_auth_only = no smtpd_tls_cert_file = /etc/ssl/certs/smtpd.crt smtpd_tls_key_file = /etc/ssl/private/smtpd.key smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_security_level = may smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_tls_session_cache_timeout = 3600s smtpd_use_tls = yes tls_random_source = dev:/dev/urandom transport_maps = hash:/etc/postfix/transport
