之前写过一篇文章CentOS下使用mail命令发送邮件，下面介绍使用sendEmail来发送邮件

sendEmail是一个轻量级，命令行的SMTP邮件客户端。如果你需要使用命令行发送邮件，那么sendEmail是非常完美的选择:使用简单并且功能强大.这个被设计用在php、bash、perl和web站点使用。

一、安装：

sendEmail下载地址：http://caspian.dotconf.net/menu/Software/SendEmail/

# wget http://caspian.dotconf.net/menu/Software/SendEmail/sendEmail-v1.56.tar.gz //下载1.56版本
# tar -xzvf sendEmail-v1.56.tar.gz //解压后就可以使用了
# cd sendEmail-v1.56
# cp sendEmail /usr/local/bin/

二、发送邮件

#  /usr/local/bin/sendEmail -f 发件人@163.com -t 收件人@qq.com \
    -s smtp.163.com -u "我是邮件主题" -o message-content-type=html \
    -o message-charset=utf8 -xu 发件人@163.com -xp 密码 -m "我是邮件内容"

命令说明：

/usr/local/bin/sendEmail 命令主程序
-f ttlsafrom@163.com  发件人邮箱
-s smtp.163.com       发件人邮箱的smtp服务器
-u “我是邮件主题”     邮件的标题
-o message-content-type=html   邮件内容的格式,html表示它是html格式
-o message-charset=utf8         邮件内容编码
-xu ttlsafrom@163.com           发件人邮箱的用户名
-xp 123456               发件人邮箱密码

-m “我是邮件内容”         邮件的具体内容

发送成功之后会有如下提示：
Apr 21 15:26:22 centos-02 sendEmail[753]: Email was sent successfully!

#  /usr/local/bin/sendEmail --help
sendEmail-1.56 by Brandon Zehm <caspian@dotconf.net>
Synopsis:  sendEmail -f ADDRESS [options]
  Required:
    -f ADDRESS                from (sender) email address
    * At least one recipient required via -t, -cc, or -bcc
    * Message body required via -m, STDIN, or -o message-file=FILE
  Common:
    -t ADDRESS [ADDR ...]     to email address(es)
    -u SUBJECT                message subject
    -m MESSAGE                message body
    -s SERVER[:PORT]          smtp mail relay, default is localhost:25
  Optional:
    -a   FILE [FILE ...]      file attachment(s)
    -cc  ADDRESS [ADDR ...]   cc  email address(es)
    -bcc ADDRESS [ADDR ...]   bcc email address(es)
    -xu  USERNAME             username for SMTP authentication
    -xp  PASSWORD             password for SMTP authentication
  Paranormal:
    -b BINDADDR[:PORT]        local host bind address
    -l LOGFILE                log to the specified file
    -v                        verbosity, use multiple times for greater effect
    -q                        be quiet (i.e. no STDOUT output)
    -o NAME=VALUE             advanced options, for details try: --help misc
        -o message-content-type=<auto|text|html>
        -o message-file=FILE         -o message-format=raw
        -o message-header=HEADER     -o message-charset=CHARSET
        -o reply-to=ADDRESS          -o timeout=SECONDS
        -o username=USERNAME         -o password=PASSWORD
        -o tls=<auto|yes|no>         -o fqdn=FQDN
  Help:
    --help                    the helpful overview you're reading now
    --help addressing         explain addressing and related options
    --help message            explain message body input and related options
    --help networking         explain -s, -b, etc
    --help output             explain logging and other output options
    --help misc               explain -o options, TLS, SMTP auth, and more

参考：http://www.ttlsa.com/linux/use-sendemail/