Julian Mehnle wrote:
why do we forbid "a:1.2.3.4"? It's a valid FQDN, after all.
It's not, see STD 3 (1123) 2.1 "host names and numbers". SPF
is less restrictive using <toplabel> as specified in 2396, and
even the most liberal 3696 won't allow a digit-only <toplabel>.
Harald checked this with IANA, IAB, IESG, and the namedroppers
for the purposes of USEFOR, see also the thread ending with
<http://mid.gmane.org/43A07EC8(_dot_)387C(_at_)xyzzy(_dot_)claranet(_dot_)de>
and
<http://mid.gmane.org/439EE3D1(_dot_)5184(_at_)xyzzy(_dot_)claranet(_dot_)de>
after
<http://permalink.gmane.org/gmane.ietf.usenet.format/30246>.
Bye, Frank
-------
Sender Policy Framework: http://www.openspf.org/
Archives at http://archives.listbox.com/spf-discuss/current/
To unsubscribe, change your address, or temporarily deactivate your
subscription,
please go to
http://v2.listbox.com/member/?listname=spf-discuss(_at_)v2(_dot_)listbox(_dot_)com