public function addAttachment(Zend_Mime_Part $attachment)
    {
        $this->addPart($attachment);
        $this->hasAttachments = true;

        return $this;
    }
public function addAttachment(Zend_Mime_Part $attachment)
    {
        $this->addPart($attachment);
        $this->hasAttachments = true;

        return $this;
    }
public function addAttachment ( Zend_Mime_Part $ attachment ) { $ this -> addPart ( $ attachment ) ; $ this -> hasAttachments = true ; return $ this ; }
Adds an existing attachment to the mail message

@param  Zend_Mime_Part $attachment
@return Zend_Mail Provides fluent interface
Adds an existing attachment to the mail message