>I hadn't considered the DNS lookup issue for SPF mentioned previously. I 
>thought the ten lookup limit applied once you located
>the correct DNS record. Google should have been more considerate and required 
>a record, such as, _google-pm.domain.tld.

Google's record doesn't affect SPF.  Look at section 4.5 of RFC 7208,
and you'll see that SPF takes all of the records returned for the TXT
lookup, and only picks the one that starts with v=spf1.  Other records
are ignored and don't count toward the lookup limit.

R's,
John

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