thanks for the input. this is the new version.
is there an RFC that describes CIDR notation? i'd like to be able to
just say "see rfcXXXX for details".
------------------------------------------------------------------------
3.7 IP4
------------------------------------------------------------------------
Valid syntax:
- ip4:192.0.2.0/24
- ip4:192.0.2.1
An IP4 range is specified using network/prefix-length notation. The
network part is a dotted quad. The prefix-length is a number between
0 and 32 inclusive. If no prefix-length is given, /32 is assumed.
If the network-part contains non-zero bits beyond the specified
prefix, this is a mild syntax error which SPF clients MUST tolerate
by ignoring the non-zero bits.
If the connecting IPv4 client IP lies in the specified network, this
mechanism matches.
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Sender Permitted From: http://spf.pobox.com/
Archives at http://archives.listbox.com/spf-discuss/current/
Latest draft at http://spf.pobox.com/draft-mengwong-spf-02.txt
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