code: public void addAttachment(final byte[] content, final String filename, final String mimetype)
  		throws MessagingException
  	{
  		final DataSource dataSource = new ByteArrayDataSource(content, mimetype);
  		final DataHandler dataHandler = new DataHandler(dataSource);
  		addAttachment(dataHandler, filename);
  	}
docs: Adds the attachment.
  
  @param content
  The bytearray with the content.
  @param filename
  The new Filename for the attachment.
  @param mimetype
  The mimetype.
  
  @throws MessagingException
  is thrown if the underlying implementation does not support modification of
  existing values