postfix如何拒绝中继

scyzxp

加一个发送认证

ruochen

status=deferred
status=bounced
Blocked for abuse. See http://att.net/blocks

应该是rbl起作用了吧

刘五十三

哈哈，看来这问题很多邮件服务器都没有考虑过，至少我看到sendmail,qmail,postfix,notes,mademon,exchange全部都有密码破解被利用发邮件的问题，要说是漏洞也不好讲，学校服务器上成千shell帐号还容易被人猜密码呢。

darnis

Postfix on a stand-alone Internet host

Postfix should work out of the box without change on a stand-alone machine that has direct Internet access. At least, that is how Postfix installs when you download the Postfix source code via http://www.postfix.org/.

You can use the command "postconf -n" to find out what settings are overruled by your main.cf. Besides a few pathname settings, few parameters should be set on a stand-alone box, beyond what is covered in the BASIC_CONFIGURATION_README document:

/etc/postfix/main.cf:
    # Optional: send mail as user@domainname instead of user@hostname.
    #myorigin = $mydomain

    # Optional: specify NAT/proxy external address.
    #proxy_interfaces = 1.2.3.4

    # Alternative 1: don't relay mail from other hosts.
    mynetworks_style = host
    relay_domains =

    # Alternative 2: relay mail from local clients only.
    # mynetworks = 192.168.1.0/28
    # relay_domains =
See also the section "Postfix on hosts without a real Internet hostname" if this is applicable to your configuration.