On Wednesday, June 12, 2013 09:26:56 AM Tim Draegen wrote:
> On Jun 12, 2013, at 5:45 AM, Tom Hendrikx <[email protected]> wrote:
> >>> https://dmarcian.com/spf-survey/microsoft.com
> >>> indeed...
> >> 
> >> wonder if its not possible with v=spf1 ptr mx a +all for a good start ?
> >> 
> >> what does "Network objects should not contain host bits" mean while we
> >> are at it ?
> > 
> > It seems to me that dmarcian tells us that 207.68.169.173/30 is wrong,
> > while 207.68.169.172/30 is correct cidr notation. It doesn't complain
> > about correct cidr notations like 157.55.0.192/26.
> 
> The "Network objects should not contain host bits" is a warning that comes
> from the underlying library used to validate IP addresses and IP networks. 
> Since the SPF RFC describes this as being either an address or a network, a
> warning is surfaced for oddly-formed network expressions.
> 
> If I'm reading this too narrowly, by all means, please let me know!  I'm
> happy to suppress this the information is unnecessary (as perhaps the
> receiving world's SPF stacks simply don't care).

There are implementations that care, so you are right to raise the warning.

Scott K
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