In <20040806020420(_dot_)C5F4C81FAC(_at_)portent(_dot_)listbox(_dot_)com>
"Andriy G. Tereshchenko" <spf-discuss(_at_)spam(_dot_)24(_dot_)odessa(_dot_)ua>
writes:
But I would like to add one more note:
There is no needs for wildcard SPF records !!
This is possible to send single DNS request for multiple record types and
domains. (RFC 1035 Sect. 4.1.2. "QDCOUNT (usually 1)" -
but in our case it will be 4)
Uh, no. You can not send multiple queries in a single DNS request,
even though QDCOUNT is a 16 bit integer. The reason is that there are
flag fields for things like authorative answers that have only a
single bit. If more than one query was allowed, these bit flags would
need to be an array of bit flags.
See http://www.acmebw.com/askmrdns/archive.php?category=81&question=461
(note that acmebw.com is now owned by Verisign, the folks that run the
.com root name servers.)
-wayne