At 2:08 -0700 4/10/09, SM wrote:
It's called NULL MX. There is an expired I-D about it at http://www.ietf.org/proceedings/05aug/IDs/draft-delany-nullmx-00.txt The attempt to standardize the practice was viewed as a bad idea by the DNSEXT WG.
There are three messages in the namedroppers archive about this. One post says "send it to DNSOP." (So, it's about time. ;) )
But the draft really isn't about DNS. It's about SMTP.
The MX RR will be ignored. There will be an AAAA DNS request and a fallback to the A RR for security.eu.debian.org. Newer versions of sendmail and Postfix will treat that MX RR as a bad MX and reject the message instead of retrying.
...it's about SMTP... -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Edward Lewis NeuStar You can leave a voice message at +1-571-434-5468 Getting everything you want is easy if you don't want much. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
