Send-Mail: Warning: Inet_protocols: IPv6 Supp

Here’s how to fix the following Postfix issue:

send-mail: warning: inet_protocols: IPv6 support is disabled: Address family not supported by protocol

send-mail: warning: inet_protocols: configuring for IPv4 support only

postdrop: warning: inet_protocols: IPv6 support is disabled: Address family not supported by protocol

postdrop: warning: inet_protocols: configuring for IPv4 support only

vim /etc/postfix/main.cf

Search for: inet_protocols and change it from “inet_protocols = all” to “inet_protocols = ipv4″

Save /etc/postfix/main.cf and and restart Postfix service:

# /etc/init.d/postfix restart

发邮件的方法

echo “This is a test mail!”|mail -s text **@mail.ustc.edu.cn

mail -s test **@mail.ustc.edu.cn < file

-s后接主体，内容可以是eho内容或者是文本

eg

* * * * * sh /opt/sendnote.sh &

[root@cs mydata]# more /opt/sendnote.sh

#/bin/bash

/usr/local/mysql/bin/mysql -e 'select count(*) from mysql.user'

if [ $? -ne 0 ];then

echo "mysql is error!"|/bin/mail -s "xxx.xxx.xxx.xxx DBNAME" xxxxxxxxxxx@139.com

fi

这样数据库有问题的话，就会报错