On 1/24/20 12:28 PM, Jaroslaw Rafa via mailop wrote:
In my opinion, "-all" is good only when it is the *only* entry in the SPF record, ie. SPF record indicates that the domain does not send mail *at all*. In all other cases, I think that even if original SPF record specifies "-all", the receiving server should override this and interpret it as "?all".
I tend to disagree. If you allow every IP to send mail on your behalf, then why even bother putting an SPF record. For me, only -all makes sense, all others are just as meaningful as having no SPF records at all.
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