More secure temp folder selection in fakesendmail

Use .eml extension for created files, works better with Apple Mail

test/fakesendmail.sh

@@ -1,21 +1,22 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #Fake sendmail script, adapted from:
 #https://github.com/mrded/MNPP/blob/ee64fb2a88efc70ba523b78e9ce61f9f1ed3b4a9/init/fake-sendmail.sh
-numPath="/tmp/fakemail"
 
+#Create a temp folder to put messages in
+numPath="${TMPDIR-/tmp/}fakemail"
+umask 037
 mkdir -p $numPath
 
 if [ ! -f $numPath/num ]; then
-echo "0" > $numPath/num
+  echo "0" > $numPath/num
 fi
 num=`cat $numPath/num`
 num=$(($num + 1))
 echo $num > $numPath/num
 
-name="$numPath/letter_$num.txt"
+name="$numPath/message_$num.eml"
 while read line
 do
-echo $line >> $name
+  echo $line >> $name
 done
-chmod 777 $name
-/bin/true
+exit 0