It appears that Royce Williams via mailop <ro...@techsolvency.com> said: >Unfortunately, this is not correct, despite the official documentation. >There are multiple reports on Reddit and other places of people getting the >explicit "authentication required" SMTP response at much lower volumes.
You definitely will if you're sending over IPv6. Considering that it takes about two minutes to publish an SPF record, even though it's not very useful, there's no reason not to have one. R's, John _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
