Hi, usually there's some kind of "all" mechanism (~all, -all ?all) when using a SPF record for a domain. Is a SPF record without an "all" mechanism valid at all (implicit +all) or is this an invalid record in this case?
https://datatracker.ietf.org/doc/html/rfc7208#section-5.1 is not mentioning a "must use" or "must exist". As a SPF record is processed from left to right, it should not matter for valid entries that exist in the SPF record, but there's not statement whtat to do with non matching hosts. Anyone can help? Thanks Norbert
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