Email unsubscribe user error

We could not unsubscribe your email address from the “Introductory emails” mailing list.

The most likely explanation is that the unsubscribe link you clicked did not contain the correct information due to a problem with your email software. Make sure the exact and complete address is loaded into your web browser in order to try again. If the problem persists, please ask your email provider to help you fix the broken link.