问题
When using MailChimp API v3, then delete a member using "DELETE" method
I can;t re-subscribe the same email, even when it not exists in list
it keep say
<email> is already a list member. Use PUT to insert or update list members.
回答1:
I wrote Mail Chimp asking about this after having the same problem. They recently restructured how they handle deletions to stay compliant with local and international sending laws. Now when you delete a subscriber, the subscriber is technically removed from the list, but Mail Chimp is still storing it on their end. The status of this member is just changed from 'susbscribed' to ''. So you will see it removed from the list, but if you GET all members, you will see the deleted member. In order to re-subscribe them, you can just do a PUT call to update the subscribers status to subscribed from no status.
http://developer.mailchimp.com/documentation/mailchimp/reference/lists/members/#edit-put_lists_list_id_members_subscriber_hash
回答2:
This appears to be a bug on MailChimp's side, not anything you're doing wrong.
来源：https://stackoverflow.com/questions/36494975/can-not-re-subscribe-deleted-member