SMTP and Webmail not sending

I have been unable to send mail since early this morning, I receive an SMTP error about the lookup being temporarily unavailable. I am also trying to send from webmail, the message goes out, but is never delivered. This problem is not reported on the status page (what a surprise), and I have not seen any comments on this on this forum. Does anyone know what is going on? I have a feeling it is related to the “maintenance” that was performed last night.

What’s your domain and what’s the exact error message you’re getting?

Is your test message from webmail being sent to a domain we host?