Not polite?

I've just noticed that a few comments have been posted through the HaloScan system which I seem to have had no notification for. Normally when somebody posts a comment I get a mail telling me that it's there but for the last few days and certainly the last few comments made I have had nothing. This may be to do with the recent spate of e-mail viruses and the fact that I've got my Spam checking turned up to its fullest extent so please, if you make a comment and I don't respond straight away, be patient.