What is the impact of e-business on regular mail?

The effect of email has been extremely serious, considering it's as good as free, secure and extremely fast.

Increasingly, ordinary 'snail' mail is used for advertising, in other words, for 'junk mail'.

Obviously, 'snail mail' is still essential from things like important documents that have to be moved from one place to another, for parcels and for mail and documents that need a signature.

Despite all this, e-business has led to the rise of eBay and online shopping. The goods have to be moved to the customer.