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Asked: 2020-10-29 03:04:00 +0800 CST

具有多个 IP 的后缀 tls 配置

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我正在尝试将后缀配置为使用多个 IP 的不同密钥加密传出邮件。

主要.cf postconf -n：

    alias_database = hash:/etc/aliases
    alias_maps = hash:/etc/aliases
    anvil_rate_time_unit = 86400s
    anvil_status_update_time = 120s
    append_dot_mydomain = no
    biff = no
    compatibility_level = 2
    inet_interfaces = all
    inet_protocols = ipv4
    mailbox_size_limit = 0
    milter_default_action = accept
    milter_protocol = 6
    mydestination = $myhostname, domain.com, localhost.localdomain, localhost.localdomain, localhost
    myhostname = domain.com
    mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
    myorigin = /etc/mailname
    non_smtpd_milters = inet:localhost:8891
    readme_directory = no
    recipient_delimiter = +
    relayhost =
    sender_dependent_default_transport_maps = hash:/etc/postfix/sender_transport
    smtp_tls_mandatory_ciphers = high
    smtp_tls_mandatory_protocols = !SSLv2,!SSLv3
    smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
    smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
    smtpd_client_event_limit_exceptions = $mynetworks
    smtpd_client_message_rate_limit = 200
    smtpd_client_restrictions = permit_mynetworks,permit_sasl_authenticated,reject
    smtpd_milters = inet:localhost:8891
    smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
    smtpd_sasl_auth_enable = yes
    smtpd_sasl_local_domain = $myhostname
    smtpd_sasl_security_options = noanonymous
    smtpd_tls_mandatory_ciphers = high
    smtpd_tls_mandatory_protocols = !SSLv2,!SSLv3
    smtpd_tls_security_level = may
    smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
    smtpd_use_tls = yes
    tls_high_cipherlist = ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK

大师.cf：

    smtp      inet  n       -       y       -       -       smtpd
    #smtp      inet  n       -       y       -       1       postscreen
    #smtpd     pass  -       -       y       -       -       smtpd
    #dnsblog   unix  -       -       y       -       0       dnsblog
    #tlsproxy  unix  -       -       y       -       0       tlsproxy
    #submission inet n       -       y       -       -       smtpd
    127.0.0.1:submission inet n       -       y       -       -       smtpd
      -o syslog_name=postfix/submission
      -o smtpd_tls_security_level=encrypt
      -o smtpd_sasl_auth_enable=yes
      -o smtpd_sasl_security_options=noanonymous
      -o smtpd_reject_unlisted_recipient=no
      -o smtpd_client_restrictions=permit_sasl_authenticated,reject
      -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
      -o smtpd_tls_cert_file=/srv/letsencrypt/ssl/domain.com/domain.com_chained.crt
      -o smtpd_tls_key_file=/srv/letsencrypt/ssl/domain.com/domain.com.key

    # domain2.com
    111.1.1.222:submission inet n       -       y       -       -       smtpd
      -o syslog_name=postfix/submission
      -o smtpd_tls_security_level=encrypt
      -o smtpd_sasl_auth_enable=yes
      -o smtpd_sasl_security_options=noanonymous
      -o smtpd_reject_unlisted_recipient=no
      -o smtpd_client_restrictions=permit_sasl_authenticated,reject
      -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
      -o smtpd_tls_key_file=/srv/letsencrypt/ssl/domain2.com/domain2.com.key
      -o smtpd_tls_cert_file=/srv/letsencrypt/ssl/domain2.com/domain2.com_chained.crt

邮件日志：

    Oct 28 11:43:05 zipserver postfix/postfix-script[2239]: starting the Postfix mail system
    Oct 28 11:43:05 zipserver postfix/master[2241]: daemon started -- version 3.3.0, configuration /etc/postfix
    Oct 28 11:43:32 zipserver postfix/pickup[2242]: 0BFA8104115B: uid=1000 from=<[email protected]>
    Oct 28 11:43:32 zipserver postfix/cleanup[2248]: 0BFA8104115B: message-id=<[email protected]>
    Oct 28 11:43:32 zipserver postfix/qmgr[2243]: 0BFA8104115B: from=<[email protected]>, size=407, nrcpt=1 (queue active)
    Oct 28 11:43:32 zipserver postfix/smtp[2250]: 0BFA8104115B: to=<[email protected]>, relay=gmail-smtp-in.l.google.com[64.233.167.27]:25, delay=0.46, delays=0.13/0.01/0.05/0.27, dsn=2.0.0, status=sent (250 2.0.0 OK  1603881812 s81si4271295wmf.188 - gsmtp)
    Oct 28 11:43:32 zipserver postfix/qmgr[2243]: 0BFA8104115B: removed

版本：

    postconf -d | grep mail_version
    mail_version = 3.3.0

但是电子邮件以红色交叉锁到达 gmail，而 gmail 说它没有加密。我错过了什么？

postfix gmail

1 个回答

  1. Best Answer

    从设置smtp_tls_security_level=may或更高开始。

    您没有设置任何选项来允许 postfix 偏离其不使用 TLS 发送邮件的默认设置。还有其他更细粒度的方法可以控制此行为 - 但这是允许使用所提供内容的最基本设置。用于man 5 postconf阅读其他可能选项的具体含义。

    为了帮助进一步调查，我建议还设置smtp_tls_log_level=1（在您的系统日志中包含此信息）和smtpd_tls_received_header=yes（在邮件标题中发布有关您的邮件提交的信息）。

    • 2

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