There is an error with the SPF record as the domain specified in the redirect modifier does not contain a valid SPF record. If a redirect modifier is present in an SPF record, the domain value of that modifier MUST have a valid SPF record. This criteria is per RFC 7208 section 6.1.
For example, the SPF record tested for your domain of yourdomain.com is v=spf1 redirect=example.com . If example.com DOES NOT contain a valid SPF record, then the SPF record for yourdomain.com will fail SPF tests.
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