FWIW, there's been an interesting little thread on SPF
problems caused by non-SPF stuff in TXT here:
The problem described there looks like an implementation error only. The
parser that Michael was using that failed didn't take into account additional
records with non-SPF information.
While RFC 1464 is one way to distinguish useful information from not useful
information, it isn't the only way. Other unique tokens identifying MARID
records would work.
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