The token in your mailing list confirmation email apparently has expired (typically they are good for around 24 hours).
A new confirmation email should be headed your way.
It may take several minutes for the email to appear in your inbox. If it never arrives:
- The standard comments of checking your spam/junk folder(s) etc. apply.
- Try signing up again — see homepage sign-up area
- If all else fails, simply email "Subscribe" to <subscriptions2025@daviddurlach.com>.
In all cases, you may expect a final email confirming you are properly signed up.)