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Postfix SASL 允许 SMTP 身份验证和中继消息

tag-icon • tag-icon postfix sasl smtp-auth saslauthd
Postfix SASL 允许 SMTP 身份验证和中继消息

我正在尝试设置我的 SMTP 服务器，以便它仅允许通过 SMTP 身份验证的用户发送电子邮件，但实际发送是通过 Mailjet 完成的。我正在运行，Ubuntu 14.04 LTSPostfix 版本是mail_version = 2.9.6

如果客户端使用凭证进行身份验证 - 则会对其进行验证（如果凭证无效，则拒绝邮件）。但如果客户端未进行身份验证，则仍可以发送邮件。

请注意，我正尝试将电子邮件发送到所有域。而不仅仅是限制列表。

我如何拒绝所有未经授权的用户？

主配置文件

# See /usr/share/postfix/main.cf.dist for a commented, more complete version


# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=no
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache


smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = mail2.xxx.cz
broken_sasl_auth_clients = yes
#smtpd_tls_auth_only = no

smtpd_delay_reject = yes
#smtpd_client_restrictions = permit_sasl_authenticated, reject


smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination, permit_mynetworks, check_r$

#permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination
#permit_sasl_authenticated,
#   reject_unauth_destination,
#   permit_mynetworks,
#   check_relay_domains

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = sweetparadise.cz
virtual_alias_maps = hash:/etc/postfix/virtual
virtual_alias_domains = domain1.cz domain2.cz domain3.cz
alias_database = hash:/etc/aliases
myorigin = /etc/mailname

relayhost = [in-v3.mailjet.com]:587

mynetworks = 127.0.0.0/8 192.168.137.1 [::ffff:127.0.0.0]/104 [::1]/128
home_mailbox=Maildir/

smtp_tls_security_level = encrypt

答案1

所以问题在于我使用端口转发从 Windows 主机到运行 Postfix 的虚拟机。因此所有流量都通过192.168.137.1。这导致电子邮件来自允许我的网络所以全部被接受了。

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