Logged in this morning to find this:

1

?
Mail-in-a-Box is configured to use a public DNS server. This is not supported by spamhaus. Could not determine whether this box’s IPv4 address is blacklisted.

The server is using internal DNS and I do not know where this has come from.

Nothing has been done to the server and no changes have been made at Namecheap for the domain.

Any ideas?

Many thanks

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What version of Mail in a Box are you on?

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v75, I’ve had it for about a week