I get a lot of email, most of which is 'spam'. My email system dumps all the emails that it thinks are spam into a 'spam directory'. I do go through the spam directory from time to time, but with so many emails to check, it is inevitable that some of your emails do get mixed up with the spam.
To try and reduce the number of emails that get lost, you need to specify the subject of the email as 'Peter's Page' so that I can easily spot the genuine emails. If you don't use that 'subject title', then I can't guarantee that your email will get read!