I have been using  a workflow rules which sends an email when a particular field in a sales order is updated. I have been using it successfully for over a year.

Suddenly- at some point in the last 2 or 3 days, this is no longer working.

I have checked the setup- the rule is still there, and seems to be active. I reviewd the rule to make sure it was OK, clicked "edit" and then saved it again to see if this would "refresh" things but still no joy.

I notice there are some people complaining about late email delivery from Zoho mail- could this be related in anyway?

For what it's worth, our company uses google apps, and the workflow rules send emails to the users within our organisation. All other email is functioning normally, and I have checked spam folders etc.

Any ideas?