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/**
* Function to create a mail object for futher use (uses phpMailer)
* @param string From e-mail address
* @param string From name
* @param string E-mail subject
* @param string Message body
* @return object Mail object
*/
function mosCreateMail( $from='', $fromname='', $subject, $body ) {
   global $mosConfig_absolute_path, $mosConfig_sendmail;
   global $mosConfig_smtpauth, $mosConfig_smtpuser;
   global $mosConfig_smtppass, $mosConfig_smtphost;
   global $mosConfig_mailfrom, $mosConfig_fromname, $mosConfig_mailer;

   $mail = new mosPHPMailer();

   $mail->PluginDir = $mosConfig_absolute_path .'/includes/phpmailer/';
   $mail->SetLanguage( 'en', $mosConfig_absolute_path . '/includes/phpmailer/language/' );
   $mail->CharSet    = substr_replace(_ISO, '', 0, 8);
   $mail->IsMail();
   $mail->From    = $from ? $from : $mosConfig_mailfrom;
   $mail->FromName = $fromname ? $fromname : $mosConfig_fromname;
   $mail->Mailer    = $mosConfig_mailer;

   // Add smtp values if needed
   if ( $mosConfig_mailer == 'smtp' ) {
      $mail->SMTPAuth = $mosConfig_smtpauth;
      $mail->Username = $mosConfig_smtpuser;
      $mail->Password = $mosConfig_smtppass;
      $mail->Host    = $mosConfig_smtphost;
   } else

   // Set sendmail path
   if ( $mosConfig_mailer == 'sendmail' ) {
      if (isset($mosConfig_sendmail))
         $mail->Sendmail = $mosConfig_sendmail;
   } // if

   $mail->Subject    = $subject;
   $mail->Body    = $body;

   return $mail;
}

/**
* Mail function (uses phpMailer)
* @param string From e-mail address
* @param string From name
* @param string/array Recipient e-mail address(es)
* @param string E-mail subject
* @param string Message body
* @param boolean false = plain text, true = HTML
* @param string/array CC e-mail address(es)
* @param string/array BCC e-mail address(es)
* @param string/array Attachment file name(s)
* @param string/array ReplyTo e-mail address(es)
* @param string/array ReplyTo name(s)
* @return boolean
*/
function mosMail( $from, $fromname, $recipient, $subject, $body, $mode=0, $cc=NULL, $bcc=NULL, $attachment=NULL, $replyto=NULL, $replytoname=NULL ) {
   global $mosConfig_debug;

   // Filter from, fromname and subject
   if (!JosIsValidEmail( $from ) || !JosIsValidName( $fromname ) || !JosIsValidName( $subject )) {
      return false;
   }

   $mail = mosCreateMail( $from, $fromname, $subject, $body );

   // activate HTML formatted emails
   if ( $mode ) {
      $mail->IsHTML(true);
   }

   if (is_array( $recipient )) {
      foreach ($recipient as $to) {
         if (!JosIsValidEmail( $to )) {
            return false;
         }
         $mail->AddAddress( $to );
      }
   } else {
      if (!JosIsValidEmail( $recipient )) {
         return false;
      }
      $mail->AddAddress( $recipient );
   }
   if (isset( $cc )) {
      if (is_array( $cc )) {
         foreach ($cc as $to) {
            if (!JosIsValidEmail( $to )) {
               return false;
            }
            $mail->AddCC($to);
         }
      } else {
         if (!JosIsValidEmail( $cc )) {
            return false;
         }
         $mail->AddCC($cc);
      }
   }
   if (isset( $bcc )) {
      if (is_array( $bcc )) {
         foreach ($bcc as $to) {
            if (!JosIsValidEmail( $to )) {
               return false;
            }
            $mail->AddBCC( $to );
         }
      } else {
         if (!JosIsValidEmail( $bcc )) {
            return false;
         }
         $mail->AddBCC( $bcc );
      }
   }
   if ($attachment) {
      if (is_array( $attachment )) {
         foreach ($attachment as $fname) {
            $mail->AddAttachment( $fname );
         }
      } else {
         $mail->AddAttachment($attachment);
      }
   }
   //Important for being able to use mosMail without spoofing...
   if ($replyto) {
      if (is_array( $replyto )) {
         reset( $replytoname );
         foreach ($replyto as $to) {
            $toname = ((list( $key, $value ) = each( $replytoname )) ? $value : '');
            if (!JosIsValidEmail( $to ) || !JosIsValidName( $toname )) {
               return false;
            }
            $mail->AddReplyTo( $to, $toname );
         }
        } else {
         if (!JosIsValidEmail( $replyto ) || !JosIsValidName( $replytoname )) {
            return false;
         }
         $mail->AddReplyTo($replyto, $replytoname);
      }
    }

   $mailssend = $mail->Send();

   if( $mosConfig_debug ) {
      //$mosDebug->message( "Mails send: $mailssend");
   }
   if( $mail->error_count > 0 ) {
      //$mosDebug->message( "The mail message $fromname <$from> about $subject to $recipient <b>failed</b><br /><pre>$body</pre>", false );
      //$mosDebug->message( "Mailer Error: " . $mail->ErrorInfo . "" );
   }
   return $mailssend;
} // mosMail

/**
* Checks if a given string is a valid email address
*
* @param   string   $email   String to check for a valid email address
* @return   boolean
*/
function JosIsValidEmail( $email ) {
   $valid = preg_match( '/^[\w\.\-]+@\w+[\w\.\-]*?\.\w{1,4}$/', $email );
   
   return $valid;
}

/**
* Checks if a given string is a valid (from-)name or subject for an email
*
* @since      1.0.11
* @deprecated   1.5
* @param      string      $string      String to check for validity
* @return      boolean
*/
function JosIsValidName( $string ) {
   /*
    * The following regular expression blocks all strings containing any low control characters:
    * 0x00-0x1F, 0x7F
    * These should be control characters in almost all used charsets.
    * The high control chars in ISO-8859-n (0x80-0x9F) are unused (e.g. http://en.wikipedia.org/wiki/ISO_8859-1)
    * Since they are valid UTF-8 bytes (e.g. used as the second byte of a two byte char),
    * they must not be filtered.
    */
   $invalid = preg_match( '/[\x00-\x1F\x7F]/', $string );
   if ($invalid) {
      return false;
   } else {
      return true;
   }
}

$mail -> AddCustomHeader('Disposition-Notification-To:'.$from);