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禁用异地邮件中继

[英]Disable offsite mail relaying

原文 2020-06-16 12:54:53 9 1 email/ smtp/ relay/ disable/ offsite

RHEL6 | RHEL6 | High Sev高严重性

Vulnerability Title SMTP unauthenticated 3rd-party mail relay漏洞名称SMTP 未经身份验证的第三方邮件中继

Vuln Description lity is that other organizations, in an attempt to stop the flow of spam, may throw away any mail originating from your server (including legitimate mail from your users).漏洞描述是其他组织为了阻止垃圾邮件的流动，可能会丢弃来自您服务器的任何邮件（包括来自您用户的合法邮件）。

1 个解决方案

Following FIX Helped, take backup of file在 FIX Helped 之后，备份文件

Comment out the below entry cd /etc/mail注释掉下面的条目 cd /etc/mail

[root@mail]# cat sendmail.mc | [root@mail]# cat sendmail.mc | grep -v ^dnl | grep -v ^dnl | grep -i smart define( SMART_HOST', relaymail.sapient.com')dnl [root@mail]# [root@mail]# grep -i smart define( SMART_HOST', relaymail.sapient.com')dnl [root@mail]# [root@mail]#

Below entry should be commented out [root@ mail]# cat sendmail.mc |下面的条目应该被注释掉 [root@mail]# cat sendmail.mc | grep -v ^dnl | grep -v ^dnl | grep -i mailerta FEATURE( mailertable', hash -o /etc/mail/mailertable.db')dnl grep -i mailerta FEATURE( mailertable', hash -o /etc/mail/mailertable.db')dnl

[root@mail]# cp -p sendmail.mc sendmail.mc.bkp. [root@mail]# cp -p sendmail.mc sendmail.mc.bkp。 date +%F [root@mail]# date +%F [root@mail]#

[root@mail]# m4 sendmail.mc > sendmail.cf [root@mail]# m4 sendmail.mc > sendmail.cf

Add below entry in /etc/mail/mailertable to disable offsite mail relay在 /etc/mail/mailertable 中添加以下条目以禁用异地邮件中继

gmail.com smtp:[192.168.100.x]. gmail.com smtp:[192.168.100.x]。 error:Mail to external domain is prohibited [root@ mail]#错误：禁止向外部域发送邮件 [root@mail]#

it helped to fix.它有助于修复。 Hopefully will help, i searched a lot and finally this worked so thought to share.希望会有所帮助，我搜索了很多，最后这很有效，所以想分享一下。