参考蛮多的。。
http://storysky.blog.51cto.com/628458/293005
http://www.wilf.cn/post/centos-mutt-msmtp-setup.html
http://www.centoscn.com/image-text/config/2013/0817/1286.html
我都省事的YUM安装，，相关文件内容如下：
/etc/msmtprc
account default host xx.163.com user a@a.com password 345wrtsdxcbasdf from a@a.com maildomain a.com auth login logfile /var/log/mmlog
/etc/Muttrc.local
# Local configuration for Mutt. # set sendmail="/usr/bin/msmtp" set use_from=yes set realname="a@a.com" set editor="vi"
测试：
echo "testmail" | mutt -s "测试" b@a.com