Having been able to integrate mailchimp in one of my client's site, I've encountered an issue where an email was already unsubscribe and when i tried to re-subscribe the same email. Automatically the old information was being pulled out. Just so you know, that when an email was unsubscribed in mailchimp, it was not fully deleted in the database. Instead we can try to flag the specific member or email to full delete all the information from their database. Here's how you do it. $api->listUnsubscribe( $list_id, $_GET['email'], true ); You have to set the it to true to fully delete the information. Getting techie here :) Happy Programming!
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