From: Andy Davidson > > > Speaking with my e-commerce vendor hat on, server logs (apache, mail, > application audit logs) and other information about visitors > (especially those who have conducted a purchase transaction with > us, or signed up to our newsletter) never stop having a business > purpose - it's called referential integrity. > > We want to use them to track the behaviour fraudulent users > for example.
Anyone who runs mailing lists has to keep that info to be able to prove how and when someone opted in. David
