Unsubscribe links in marketing email, and the unsubscribe button that Gmail,
Yahoo and Apple Mail show, used to stop working 48 hours after the email was
sent. Clients who opened a campaign later saw "Link expired" and could not opt
out themselves. The links now keep working. This includes links in email you
already sent.

An unsubscribe still applies only to your venue and only to that email address.
Clicking the link more than once records one unsubscribe. The link stops
marketing email only. Booking confirmations, receipts and other service email
are unaffected, and the client's other saved preferences stay as they are.

If an unsubscribe cannot be saved, the client is asked to try the link again
instead of being told the link is not valid.