That's the beginning line of the (Internet Explorer)cautionary sheet I get when I try to access my email using: https://www.mydomainname.com/user/signin.html It continues: The security certificate presented by this website was issued for a different website's address.
Security certificate problems may indicate an attempt to fool you or intercept any data you send to the server. We recommend that you close this webpage and do not continue to this website.
If I DO continue, it won't access my individual mailbox, but WILL let me access the root mailbox.
When you create a mailbox user, you also need to associate an email account with that user. It does appear that you've done that, and when you log in using your URL, you should see your mailbox admin@
How do I let others access their email online with my Email plan?
To provide your users access to their email accounts hosted at Dynadot, you'll need to get to your unique webmail sign-in page. Please follow these steps: