A simple way to let users resubscribe to emails
The current system is embarrassing. Either they have to find an old email (which often they can't) or they have to go to a form, which requires sending them a form, which requires them filling out and seeing an unintuitive bit of text (which is clickable but doesn't look lie it) and clicking that to be sent another email which contains a way of unsubscribing, rendering the submitting of the form you sent them redundant. Many people will click submit on the original form, thinking they have now been resubscribed, but they haven't been. This needs to be rethought.