#!/bin/bash
## sillymail
## simple 'telnet' email client
##	exercise in bash, except, smtp, ...
## 

# requires 	expect
#
# Koen Noens, november 2008
# This is free software under the terms and conditions of GPL v3

## TODO : mechanism to take command line arguments 

# param
SERVER="$1"
PORT=25
RELAY="$SERVER $PORT"

BODY=$(mktemp)

## User Interface
echo;
echo -n "HELO: ";	read HELO;
echo -n "mail from: ";	read FROM;
echo -n "mail to:  ";	read TO;
echo -n "subject:  ";	read SUBJ;

if [ "$SERVER" = "" ]; then
	echo -n "mail server: " ; read SERVER
fi

usage (){
	echo; echo "$0 server"
	echo "where server is the fqdn of a mail server"
}

## write mail
echo "write message. Ctrl+D when Done"; echo
(cat > $BODY)

## do protocol with expect
expect <<EOF
spawn telnet $RELAY
expect "220*"
send "HELO $HELO \r"
expect "250*"
send "MAIL FROM: $FROM \r"
expect "250*"
send "RCPT TO: $TO \r"
expect "250"
puts "posting message, please wait ...\r"
send "DATA \r"
expect "354*"
send "Subject: $SUBJ \r\r\ $(cat $BODY) \r\r.\r"
expect "250*"
send "quit \r"
expect "250*"
EOF