mail.yourdomain.com not working.

mail.yourdomain.com not working.

We're unable to check our mail at mail.yourdomain.com 

Our DNS record for "mail" points to "business.zoho.com".  Is that correct?    

Is anyone else having this issue?

Our ZohoMail.com logins work fine but we can't seem to access mail.yourdomain.com anymore.