此主機上不允許 550 中繼
我正在使用多個伺服器（9 Linux Suse 11 和 Linux Suse 12）7/9（電子郵件工作）（都在同一個網路下）能夠像下面的腳本一樣發送電子郵件，我需要從 shell 腳本發送電子郵件到外部域。
mailx -a /opt/script/log/status.log -S smtp=[..].net -r "test@gmail.com" -s "$HOSTNAME critical_subject " -v "mymail@gmail.com" << EOF Critical Status found during the Monitoring and Control Operation. Please check the Attach Log. EOF結果我得到了這個：
Resolving host [..] . . . done. Connecting to [..]:smtp . . . connected. 220 [..] ESMTP Wed, 02 Aug 2017 09:42:58 +0200 >>> HELO a.b.c 250 a.b.c.Hello [..] >>> MAIL FROM:<test@gmail.com> 250 OK >>> RCPT TO:<mymail@gmail.com> 550 relay is not permitted on this host. smtp-server: 550 relay is not permitted on this host. "/root/dead.letter" 102/5133 . . . message not sent.有什麼建議嗎？我可以提供哪些資訊？
main.cf
queue_directory = /var/spool/postfix command_directory = /usr/sbin daemon_directory = /usr/lib/postfix data_directory = /var/lib/postfix mail_owner = postfix # REJECTING MAIL FOR UNKNOWN LOCAL USERS unknown_local_recipient_reject_code = 550 smtpd_banner = $myhostname ESMTP debug_peer_level = 2 debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5 sendmail_path = /usr/sbin/sendmail newaliases_path = /usr/bin/newaliases mailq_path = /usr/bin/mailq setgid_group = maildrop html_directory = /usr/share/doc/packages/postfix-doc/html manpage_directory = /usr/share/man sample_directory = /usr/share/doc/packages/postfix-doc/samples readme_directory = /usr/share/doc/packages/postfix-doc/README_FILES biff = no content_filter = delay_warning_time = 1h disable_dns_lookups = no disable_mime_output_conversion = no disable_vrfy_command = yes inet_interfaces = localhost inet_protocols = all masquerade_classes = envelope_sender, header_sender, header_recipient masquerade_domains = masquerade_exceptions = root mydestination = $myhostname, localhost.$mydomain myhostname = domain.domain.net mynetworks_style = subnet mynetworks= [list of ip in subnet form] relayhost = relay_adress alias_maps = hash:/etc/aliases canonical_maps = hash:/etc/postfix/canonical relocated_maps = hash:/etc/postfix/relocated sender_canonical_maps = hash:/etc/postfix/sender_canonical transport_maps = hash:/etc/postfix/transport mail_spool_directory = /var/mail message_strip_characters = \0 defer_transports = mailbox_command = mailbox_transport = mailbox_size_limit = 0 message_size_limit = 0 strict_8bitmime = no strict_rfc821_envelopes = no smtpd_delay_reject = yes smtpd_helo_required = no smtpd_client_restrictions = smtpd_helo_restrictions = smtpd_sender_restrictions = hash:/etc/postfix/access smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination ############################################################ # SASL stuff ############################################################ smtp_sasl_auth_enable = no smtp_sasl_security_options = smtp_sasl_password_maps = smtpd_sasl_auth_enable = no ############################################################ # TLS stuff ############################################################ relay_clientcerts = smtp_use_tls = no smtp_enforce_tls = no smtp_tls_CAfile = smtp_tls_CApath = smtp_tls_cert_file = smtp_tls_key_file = smtp_tls_session_cache_database = smtpd_use_tls = no smtpd_tls_CAfile = smtpd_tls_CApath = smtpd_tls_cert_file = smtpd_tls_key_file = smtpd_tls_ask_ccert = no smtpd_tls_received_header = no ############################################################ # Start MySQL from postfixwiki.org ############################################################ relay_domains = $mydestination, hash:/etc/postfix/relay virtual_alias_domains = hash:/etc/postfix/virtual virtual_alias_maps = hash:/etc/postfix/virtual更新：由於某種原因，我無法從該主機發送電子郵件。因此，我嘗試使用 7 台工作機器中的一台來發送電子郵件。添加在“損壞”的一個 mynetworks ip 列表中，並將 realy_host 作為我想用作中繼的工作地址。在中繼一中，我在 mynetworks 中添加了損壞的地址。不工作
UPDATE2：這是客戶客戶端的 SMTP 問題。我會關閉這個問題。
由於此錯誤出現在 之後
RCPT TO:，因此相應的 Postfix 配置參數是smtpd_recipient_restrictions或smtpd_relay_restrictions，具體取決於：在 2.10 之前的 Postfix 版本中，中繼權限和垃圾郵件攔截的規則組合在 下
smtpd_recipient_restrictions，導致配置容易出錯。從 Postfix 2.10 開始，中繼權限規則最好使用 實現smtpd_relay_restrictions，這樣允許的垃圾郵件攔截策略smtpd_recipient_restrictions將不再導致允許的郵件中繼策略。你有
smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination並且作為不存在的，你
smtpd_relay_restrictions屬於預設：smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination由於您的腳本未使用 SASL 進行身份驗證，因此它應該被 允許
permit_mynetworks，即它必須列在mynetworks. 您尚未在配置中指定它，但您可以使用postconf | grep "mynetworks = ". 當您連接到外部介面而不是 localhost (smtp=[..].net) 時，它應該包括外部 IP。這可能會影響 的預設值
mynetworks，從而導致您的伺服器之間存在差異：指定
mynetworks_style = subnetPostfix 何時應該“信任”與本地機器相同 IP 子網中的遠端 SMTP 客戶端。在 Linux 上，這僅適用於使用ifconfig命令指定的介面。因此，最好
mynetworks手動指定參數，例如mynetworks = 127.0.0.0/8 198.51.100.10/32