远程主机不能使用sendmail在ubuntu中发送邮件

我已经按照以下步骤来configurationsendmail

1. apt-get install sendmail

2. 在/etc/mail/auth/client-info添加以下内容

     AuthInfo:<gworks.yyy> "U:<[email protected]>" "I:<[email protected]>" "P:<xxxxxxx>" 

3. sudo bash -c "cd /etc/mail/auth/ && makemap hash client-info < client-info"

4. 在MAILER_DEFINITIONS之前添加/etc/mail/sendmail.mc的以下行

   define（ SMART_HOST', <gworks.yyy>)dnl define( confAUTH_MECHANISMS'， EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl FEATURE( authinfo'，`hash / etc / mail / auth / client-info'）dnl

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5. sudo bash -c "cd /etc/mail/ && m4 sendmail.mc > sendmail.cf"
6. 服务sendmail重启

用telnet命令testing

来自远程主机的telnet命令抛出错误中继被拒绝

 root@e5eae2c464a7:/var/www/public# telnet 10.1.2.3 25 Trying 10.1.2.3... Connected to 10.1.2.3. Escape character is '^]'. 220 cthree.gworks.yyy ESMTP Sendmail 8.15.2/8.15.2/Debian-3; Tue, 11 Oct 2016 06:45:28 GMT; (No UCE/UBE) logging access from: development.internet(OK)-development.internet [10.1.2.4] helo server 250 cthree.gworks.mobi Hello development.internet [10.1.2.4], pleased to meet you mail from: [email protected] 250 2.1.0 [email protected]... Sender ok rcpt to: [email protected] 550 5.7.1 [email protected]... Relaying denied 

我在这里做错了为什么不能从远程主机发送邮件？

 # relay if connection from 10.1.2.4 connect:10.1.2.4 RELAY # relay if connection from 10.2.0.0/24 connect:10.2.0 RELAY # relay if connection from 10.3.0.0/16 connect:10.3 RELAY