The service that we use to send out email to subscribed members has been changed from Constant Contact to MailChimp.
You should not have to do anything as all the email addresses were brought over from the old system. The only difference you should see is the sender address will change from firstname.lastname@example.org to email@example.com.
Today I sent out an email with this information. If you are a subscriber but did not receive it, please check your SPAM folder.
If you are not a subscriber but would like to be, you can signup here.