我正在多台服务器（9 Linux Suse 11 和 Linux Suse 12）7/9（电子邮件工作）（全部在同一个网络下）上工作，能够像下面的脚本一样发送电子邮件，我需要将电子邮件从 shell 脚本发送到外部域。
mailx -a /opt/script/log/status.log -S smtp=[..].net -r
"[email protected]" -s "$HOSTNAME critical_subject " -v "[email protected]" << EOF
Critical Status found during the Monitoring and Control Operation. Please
check the Attach Log.
EOF
结果我得到了这个：
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:<[email protected]>
250 OK
>>> RCPT TO:<[email protected]>
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.
有什么建议吗？我可以提供哪些信息？
主配置文件
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：由于某种原因，我无法从该主机发送电子邮件。因此，我尝试使用 7 台正常工作的机器中的一台来发送电子邮件。在“损坏”的机器上添加了 mynetworks ip 列表，并将 realy_host 作为我想用作中继的工作地址。在中继中，我在 mynetworks 中添加了损坏的机器的地址。没有用
更新2：这是客户客户端的 SMTP 问题。我将关闭该问题。
答案1
由于此错误出现RCPT TO:，相应的 Postfix 配置参数是smtpd_recipient_restrictions或者smtpd_relay_restrictions，取决于：
在 Postfix 2.10 之前的版本中，中继权限和垃圾邮件拦截规则在 下合并
smtpd_recipient_restrictions，导致配置容易出错。从 Postfix 2.10 开始，中继权限规则最好在 下实现smtpd_relay_restrictions，这样 下的宽松垃圾邮件拦截策略smtpd_recipient_restrictions将不再导致宽松的邮件中继策略。
你有
smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
并且由于不存在，您smtpd_relay_restrictions就会陷入违约：
smtpd_relay_restrictions =
permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination
由于你的脚本未使用 SASL 进行身份验证，因此它应该被允许permit_mynetworks，即它必须在mynetworks。您没有在配置中指定它，但您可以使用来检查它postconf | grep "mynetworks = "。由于您连接到外部接口而不是本地主机（smtp=[..].net），因此它应该包含外部 IP。
这可能会影响mynetworks，导致您的服务器之间存在差异：
指定
mynetworks_style = subnetPostfix 何时应“信任”与本地计算机位于同一 IP 子网中的远程 SMTP 客户端。在 Linux 上，这仅在使用该ifconfig命令指定的接口下才能正常工作。
因此，最好指定mynetworks手动参数，例如
mynetworks = 127.0.0.0/8 198.51.100.10/32