linux 使用mail 发送邮件

#!/bin/bash
 #author:findyou
 help(){
  echo "eg: 
#!/bin/bash
 #author:findyou
 help(){
  echo "eg: $0 [Subject] [address] [content_file] [file]"
  echo ""
  exit 1
 }
 
if [ ! -n "$1" ] ; then
   help
fi
 
 cDate=`date +%Y%m%d`
 
if [ ! -n "$2" ] ; then
   help
else
   mail_to=$2
   echo "   Send Mail to ${mail_to}"
fi
 
if [ ! -n "$4" ] ; then
   mail -s $1 ${mail_to}<$3
else
   mail -s $1 -a $4 ${mail_to}<$3
fi
 [Subject] [address] [content_file] [file]eg: 
#!/bin/bash
 #author:findyou
 help(){
  echo "eg: $0 [Subject] [address] [content_file] [file]"
  echo ""
  exit 1
 }
 
if [ ! -n "$1" ] ; then
   help
fi
 
 cDate=`date +%Y%m%d`
 
if [ ! -n "$2" ] ; then
   help
else
   mail_to=$2
   echo "   Send Mail to ${mail_to}"
fi
 
if [ ! -n "$4" ] ; then
   mail -s $1 ${mail_to}<$3
else
   mail -s $1 -a $4 ${mail_to}<$3
fi