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feld (feld@friedcheese.us)'s status on Wednesday, 25-Sep-2024 04:03:37 JST feld Anyone out there dealing with SMTP regularly able to comment about whether or not the current behavior of software is to fallback to either A *or* AAAA if there is a missing MX record?
I seem to be able to find references to some software that indicates it may now fall back to the AAAA but I haven't seen it myself in the wild