I saw a previous post from 'MacMaker' and your response regarding Fasthosts which I am using and the modifications to the registration page and the mail_php.PHP files as follows:
I've added this to line 1 of registration page:
<?php ini_set("sendmail_from", "email@example.com"); ?>
And changed this ( in the mail_php.PHP file)
$mailObj = mail($mailTo,$mailSubject,$mailContent,$mailHeader);
$mailObj = mail($mailTo,$mailSubject,$mailContent,$mailHeader, "-firstname.lastname@example.org");
But still know verification email.