Hector Santos <hsan...@isdg.net> wrote: > > What has been crossing my mind regarding this NULL MX setup, was the possible > privacy issue with NULL MX root domain "Traceability" aspect with legacy MTAs > performing SMTP "Implicit MX" (No MX record, Fallback to A record) logic. > What will the A query IP resolved to when the exchange points to the root?
Null MX records suppress fallback-to-A. The target "." does not have any A records. http://www.ietf.org/mail-archive/web/dnsop/current/msg12153.html Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ Trafalgar: Westerly or southwesterly in far southeast, otherwise northerly, 4 or 5, increasing 6 or 7 later in southeast. Slight or moderate, occasionally rough later. Mainly fair. Moderate or good. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
