how can i trap the nested exceptions while sending mail for example Transport.sendMessage(..) throws MessagingException where often the nested exception is IOException or FileNotFoundException because i am using attacment so if the file path is incorrect this exception is thrown.I would like to catch the precise exception but because the exception thrown is MessagingException only its subclasses can be caught.Currently i am using something like if(ex.getMessage().indexOf("IOException")>=0){do something....} to trap a IOException while attaching to the mail.Is it reliable or there is a better way to do this.