SPF checker is unreachable

I’ve received this message when adding a domain:

WARNING: Routes check is failed for given domain.
Below is detailed response from mail server : 
SPF checker is unreachable

Temporary error?

Daniel

Hi,

I assume your domain has SPF records recorded with your ISP?

Kind regards,
Michel.

Yes, SPF and DKIM records are registered in DNS for the domain.

hmmm - lets have a look -see

M.