We have been using Manager Server Edition (purchased) and sending emails with no difficulty.
However, today we have started getting the Error: NameResolutionFailure.
This is preventing sending emails.
I have checked that the mail server is resolving correctly from the manager.io server and
have restarted manager in case there was an issue.
The mail server is up and functional and the credentials for SMTP auth have not changed.
Is there any way to further debug this issue?