Fake sendmail

sendmail_fake.sh

#!/bin/sh
prefix="/home/mail"
numPath="$prefix/.num"

if [ ! -f $numPath ]; then
  echo "0" > $numPath
  chmod 0777 $numPath
fi
num=`cat $numPath`
num=$(($num + 1))
echo $num > $numPath

name="$prefix/letter_$num.eml"
echo "Return-Path: <forma@66Ton99.org.ua>" > $name
while read line
do
  echo $line >> $name
done
chmod 0777 $name
/bin/true

You have to replace sendmail_path in php.ini