Hi,
In the donation thank you email, sent from Civi, there is an unsubscribe link that says:
If you do not wish to receive any future fundraising emails from the Wikimedia Foundation, you can unsubscribe instantly. Please note we will still send you receipts, like this one, for future donations.

I would like to remove the word "instantly" from this sentence and then require that the person enter their email address in a field on the unsubscribe page.

We are finding that the thank you is generating unnecessary unsubs during periods of time that we are not sending emails. Please contact me with any questions.