$to      = $User_Contact_Call;
$subject = "$Social_Domain Registration";
$message = "Welcome to $Social_Name\r\r";
$message .= "You, or someone using this email address, has completed the first stage of the signup at $Social_Domain. under the following details.";
$message .= "\r\rUsername: $User_ID_Call\rPassword: $User_Key_Call\rEmail: $User_Contact_Call\r\rAccount Key: $activationKey";
$message .= "\r\rYou can complete the signup by clicking the following link:\r\r";
$message .= "$Social_Domain/signup.php?Call=3&CKey=$activationKey\r\r";
$message .= "If this is an error, ignore this email and contact the administrator of the site.\r\r";
$message .= "Regards,\r     $Social_Name($Social_Domain), have a nice day.";
$headers = 'From: ' . $Social_Email . '' . "\r\n" .
'Reply-To: ' . $User_Contact_Call . '' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
mail($to, $subject, $message, $headers);