I have a list of E-Mail addresses opting in to subscribe to a newsletter. However, the form that collected the addresses did not send out a "double-opt-in" confirmation E-Mail, which is legally required in the country our web site runs in.
We use MailChimp as our mailing service. MailChimp allows manually adding E-Mail addresses and lists of addresses, but it does not offer sending a confirmation E-Mail to these subscribers - different from those who signed up using MailChimp's own forms.
Is there a way to make MailChimp send a confirmation E-Mail to those addresses after all? Short of entering them all into a form myself?