We have been testing by checking and unchecking the box which allows/disallows the ‘final welcom email’ to be sent out to downloaders. The result was the same in all cases, so we asked MailChimp Support to investigate the sign up form. They say it looks like the subscribers are being added via the API. So we need to check the call being used to make sure the ‘final welcome email’ isn’t set to send in the API call (the call will override account settings), as this seems to be where the signs are pointing.
Anyone?