mail() function fails to send mail to some Unable to Send Email using mail() function

[saadatshah]

Hi,

i m facing a strange problem..i am using mail() function for sending emails to users or shoppers of my site. It is working fine for email addresses like [e-mail] but its not sending email on email address like [e-mail]

it fails to send emails on the domain which have "-" in their name. Can any1 help me in this regard. if any configuration required on linux server or something else that is required in order to get rid of this problem....

<?
/ here is the code i am using /

$strEmail=" MAIL BODY GOES HERE ";

sendEmail("Saadat Shah","[e-mail]","[e-mail]","Test Email",$strEmail);

function sendEmail($strFromName,$strFromEmail,$strToEmail,$strMailSubject,$strEmail){

$strFromString = "From: $strFromName < $strFromEmail >\r\n";
$strHeaders = "MIME-Version: 1.0\n";
$strHeaders .= "Content-type: text/html; charset=iso-8859-1\r\n";
$strHeaders .= $strFromString;
mail($strToEmail,$strMailSubject,$strEmail,$strHeaders);
}

/ end code/
?>
waiting to hear from u guys

Advance thx to all....

SaadatShah