[Bash] send email with an attachment from Terminal

Enhanced version of back-up-text-files-using-mail-function
Also check mutt  .

#!/bin/bash # send email with a file as the attachment # usage: #            mailit email files #            http://scriptdemo.blogspot.com #   note:   #           some old versions do not support the attachment option #           [tested with Heirloom mailx 12.5] function isEmail() {    cEmail=`echo $1 | grep "^[a-zA-Z]\+\([._][a-zA-Z0-9]\+\)*@\([a-zA-Z0-9]\+\.\)\+[a-zA-Z]\{2,3\}$"`    if [ ${#cEmail} -gt 0 ]; then       echo "true"    else       echo "false"    fi } function isServerOn() {   myS=$1   myp=`ping -c 2 ${myS} 2>&1 | grep "% packet" | awk '{print $6*100}'`   if [ ${#myp} -eq 0 ]; then      echo "-1" #server: ${myS} is not valid   elif [ ${myp} -eq 100 ]; then      echo "0" #server: ${myS} is off   else      echo "1" #server: ${myS} is on or partly responses   fi } if [ $# -le 1 ]; then    echo "usage: mailit email file1 [file2] ..."    exit fi #check email address targetEmail=$1 isValidEmail=`isEmail ${targetEmail}` [ ${isValidEmail} == "false" ] && echo "${targetEmail} is not a valid email address!!!" && exit #check smtp server smtpS=`echo ${targetEmail} | awk -F\@ '{print $2}'` smtpS="smtp.${smtpS}" isOnline=`isServerOn ${smtpS}` if [ ${isOnline} == "-1" ]; then      echo "SMTP server: ${smtpS} is invalid. STOP" && exit elif [ ${isOnline} == "0" ]; then      echo "SMTP server: ${smtpS} is offline. STOP" && exit fi #send email for (( nf=2; nf<=$#; nf++ )) do     eval "myfile=\$${nf}"     if [ -f ${myfile} ]; then        echo "The attachment is ${myfile} sent by `whoami` from `hostname`" > tmpcont.mailtomea        mail -s "[script] ${myfile}" -a ${myfile} ${targetEmail} < tmpcont.mailtomea && \        echo "send mail successfully" && \        rm -f tmpcont.mailtomea     else        echo "${myfile} dos not exist"     fi done