Media Wiki email problems

I have moved my media wiki from one server to another and suddenly the email feature stopped working. After a lot of searching I found out that email for Media Wiki needs php-pear-Mail which can be easily installed by

# yum install php-pear-Mail

after that add the following to LocalSettings.php

# Sending e-mails (requires php-pear-Mail)
$wgSMTP = array
  'host'     => "localhost",
  'IDhost'   => "localhost",
  'port'     => 25,
);

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