If a contact unsubscribes, will the unsubscribe action be overwritten if I subscribe the contact from Outlook?

Question:

If a contact from my Outlook unsubscribes from a Mailchimp List, if I update Mailchimp contacts again on mass from Outlook, will the unsubscribe action be overwritten?

I have a client that is looking to keep their master list in Outlook - but want to run 4 campaigns through the mailchimp engine a year.

Thanks

Answer:

Before any contacts are subscribed to a list, we check whether the contact has already unsubscribed from the list. If they have then we do not continue with the subscription for that email address.

If the original contact has been deleted from the mailchimp list, then we would not know about any previous history, and the contact could be re-added.