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Postfix 阻止内部通信

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Postfix 阻止内部通信

我想知道如何阻止我的用户互相发送邮件，但让他们有机会发送和接收外部邮件。

[电子邮件保护]<--->[电子邮件保护]拒绝

[电子邮件保护]<---> [电子邮件保护]好的

[电子邮件保护]<---> [电子邮件保护]好的

我已经尝试配置访问限制规则，例如

    /etc/postfix/main.cf:
    smtpd_recipient_restrictions =
        ...
        check_recipient_access hash:/etc/postfix/protected_destinations
        ...the usual stuff...

    smtpd_restriction_classes = insiders_only
    insiders_only = check_sender_access hash:/etc/postfix/insiders, reject

/etc/postfix/protected_destinations:
    [email protected]   insiders_only
    [email protected] insiders_only

/etc/postfix/insiders:
    my.domain       OK  matches my.domain and subdomains
    another.domain  OK  matches another.domain and subdomains

但这无济于事，因为本地发件人在检查本地收件人之前就被阻止，而本地收件人在检查外部收件人之前就被阻止。

答案1

上面的配置（显然来自这一页) 用于允许仅内部通信，并阻止从外部到内部的电子邮件。

对于你的情况，你需要修改它

# /etc/postfix/main.cf:
smtpd_recipient_restrictions =
    ...
    check_recipient_access hash:/etc/postfix/protected_destinations
    ...the usual stuff...

smtpd_restriction_classes = reject_insiders
reject_insiders = check_sender_access hash:/etc/postfix/insiders, permit

# /etc/postfix/protected_destinations:
localdomain1.example.com   reject_insiders
localdomain2.example.com   reject_insiders

# /etc/postfix/insiders:
localdomain1.example.com   REJECT local email isn't allowed
localdomain2.example.com   REJECT local email isn't allowed

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