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对外发邮件禁用垃圾扫描、病毒扫描

要对外发邮件禁用垃圾扫描、病毒扫描功能，可以在 Amavisd 配置文件 /etc/amavisd/amavisd.conf (RHEL/CentOS) 或 /etc/amavis/conf.d/50-user (Debian/Ubuntu) 或 /usr/local/etc/amavisd.conf (FreeBSD) 中增加 bypass 设置。

bypass_spam_checks_maps
bypass_virus_checks_maps
bypass_header_checks_maps
bypass_banned_checks_maps

这些设置可以添加到 $policy_bank{'MYUSERS'} 配置里。例如：

$policy_bank{'MYUSERS'} = {
    [...此处省略其它配置参数...]

    # 不执行垃圾扫描、病毒扫描、邮件头检测
    bypass_spam_checks_maps => [1],
    bypass_virus_checks_maps => [1],
    bypass_header_checks_maps => [1],

    # 不检查被禁止的文件名和文件类型
    bypass_banned_checks_maps => [1],
}

更改设置后需要重启 Amavisd 服务以使更改生效。

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