Is it possible to send mails by bash script via smtp?

bash smtp postfix-mta
Jason picture Jason · Apr 3, 2012 · Viewed 45.7k times · Source

I have postfix+dovecot. I want to make bash script which can use SMTP for this. I don't want use sendmail.

Is it possible? May be someone has some examples of code?

Answer

dldnh picture dldnh · Apr 3, 2012

Boy, when that gauntlet is thrown, it always bashes me right upside the head! :-)

#!/bin/sh

function checkStatus {
  expect=250
  if [ $# -eq 3 ] ; then
    expect="${3}"
  fi
  if [ $1 -ne $expect ] ; then
    echo "Error: ${2}"
    exit
  fi
}

MyHost=`hostname`

read -p "Enter your mail host: " MailHost
MailPort=25

read -p "From: " FromAddr

read -p "To: " ToAddr

read -p "Subject: " Subject

read -p "Message: " Message

exec 3<>/dev/tcp/${MailHost}/${MailPort}

read -u 3 sts line
checkStatus "${sts}" "${line}" 220

echo "HELO ${MyHost}" >&3

read -u 3 sts line
checkStatus "$sts" "$line"

echo "MAIL FROM: ${FromAddr}" >&3

read -u 3 sts line
checkStatus "$sts" "$line"

echo "RCPT TO: ${ToAddr}" >&3

read -u 3 sts line
checkStatus "$sts" "$line"

echo "DATA" >&3

read -u 3 sts line
checkStatus "$sts" "$line" 354

echo "Subject: ${Subject}" >&3
echo "${Message}" >&3
echo "." >&3

read -u 3 sts line
checkStatus "$sts" "$line"

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