John C Klensin <[email protected]> wrote: > > IN MX 0 . > > At least in the near term, some SMTP Server ("MTA") > implementations will conform to that rule (many already use it) > and some won't. For the latter, they will presumably do what > the SMTP specs say to do. In summary, that is to look up the > address(es) associated with the root and try to open a mail > connection to one of them.
There are no addresses associated with the root, so the mail server will immediately report a delivery error. RFC 5321 section 5.1 paragraph 2 final sentence. The SMTP server will not try to connect to the root name servers, as your message suggested. Tony. -- f.anthony.n.finch <[email protected]> http://dotat.at/ Biscay: Variable 3 or 4, becoming northwesterly 5 or 6 for a time in east. Slight or moderate. Rain or thundery showers. Good, occasionally poor. _______________________________________________ DNSOP mailing list [email protected] https://www.ietf.org/mailman/listinfo/dnsop
