The mail server isn't down, but it looks like we have a large group of emails that are still in the processing group and have not been able to be sent. I've raised a trouble ticket to the support hosting provider to investigate along to checking on the subscription emails as well.
CDE Software Team
Sales and Support
Support Hours:
Monday–Friday, 10:00 AM – 4:00 PM Pacific
Support Tickets:
https://support.cdesoftware.com
Before reporting an issue, please make sure you’re running the latest version of the software being used. Many issues are fixed in recent updates.