Email to LogIn Request

Using Access & ASP

I have a database of users and their email addresses & want to send an email to them requesting that they click on a link in the email to open a page, and log in & then to be able to add data to the database which is directly linked to their ID, so that results are shown that the data they enter comes from them.

The email link that is sent off must know all their details from the database so that when they login (I'll set up their passwords and it will be sent to them in the email), the loaded page welcomes them personally and can put their physical addresses, etc down.