A basic emailing class I wrote a while back, for sending html/plain emails

Emailer.class.php

<?php
/***********************************************************************
 * Emailer class
 * -------------
 * Copyright Samuel Atkins 2011
 * -------------
 * Simplifies sending of HTML and plain-text emails.
 * 
 * Usage:
 * send( $to        : Email address to send to
 *       $fromName  : Display name for sender
 *       $fromEmail : Email address for sender
 *       $subject   : Subject of the email
 *       $bodyPlain : Plain text message
 *       $bodyHtml  : HTML message );
 * Returns whether sending of the email was successful.
 **********************************************************************/

class Emailer
{
    private $headers = array();
    
    /**
     * Sends an email. See above for more specific documentation.
     * 
     * Returns whether email was sent successfully.
     */
    public function send($to, $fromName, $fromEmail, $subject, $bodyPlain, $bodyHtml)
    {
        $this->_setHeader('From', $fromName.' <'.$fromEmail.'>');
        $this->_setHeader('Reply-To', $from);
        
        $boundary = md5(date('r', time()));
        $this->_setHeader('Content-Type', 'multipart/alternative; boundary="PHP-alt-'.$boundary.'"');
        
        // Fix newlines?
        // $body_plain = str_replace
        
        $headersString = $this->_getHeadersString();
        $message = $this->_buildMessage($bodyPlain, $bodyHtml, $boundary);
        
        // Clear the headers, to prevent them potentially accumulating
        $this->headers = array();
        
        return @mail($to, $subject, $message, $headersString);
    }
    
    /**
     * Sets the email header '$name' to the $value.
     */
    private function _setHeader($name, $value)
    {
        $this->headers[$name] = $value;
    }
    
    /**
     * Combines all the set headers into a header string suitable for email.
     * 
     * Returns that string.
     */
    private function _getHeadersString()
    {
        $str = '';
        foreach ($this->headers as $key => $val)
        {
            $str .= $key . ': ' . $val . "\r\n";
        }
        
        return $str;
    }
    
    /**
     * Constructs the message component for mail(),
     * from the $plain and $html messages, and the $boundary.
     * 
     * Returns the complete message.
     */
    private function _buildMessage($plain, $html, $boundary)
    {
        $message = 'This is a multi-part message in MIME format.'."\r\n";
        // Plain text
        $message .= '--PHP-alt-'.$boundary."\r\n";
        $message .= 'Content-Type: text/plain; charset="iso-8859-1"'."\r\n";
        $message .= 'Content-Transfer-Encoding: 7bit'."\r\n";
        $message .= "\r\n";
        $message .= $plain."\r\n\r\n";
        // HTML
        $message .= '--PHP-alt-'.$boundary."\r\n";
        $message .= 'Content-Type: text/html; charset="iso-8859-1"'."\r\n";
        $message .= 'Content-Transfer-Encoding: 7bit'."\r\n";
        $message .= "\r\n";
        $message .= $html."\r\n\r\n";
        // End
        $message .= '--PHP-alt-'.$boundary."--\r\n";
        
        return $message;
    }
}
?>