Scott Kitterman wrote:
Your retort will no doubt be that they should publish IP addresses. Should
doesn't help me a bit. There are supposed to be something more than
1,000,000 sender policies published already. You can't change the rules on
If this were a year ago (or certainly two), then fine, but it's not. How
many sender policies are you going to break?
About 3% would break. Of these 3%, *half* have syntax or other problems
with their records (CNAMES, for instance). this is based on a sample
size of 267 domains.
Of the 267 domains I studied, 97% already have records that are 10
queries or fewer, including the initial TXT query.
95.88% are 7 queries or fewer.
86.89% are 4 queries or fewer.
Makes me think that we should adopt a limit of 7 queries, given that
only 1.12% of the domains fall between 7-10 queries (and I haven't
looked into them, but I bet they can be trivially optimized too).
Setting this limit is more effort than I anticipated, so I think we
might as well set it as low as reasonably possible (7). But I admit,
this is *a little* wishful.
I'd be glad to tell you how many will break out of 1 million, if you'd
forward me the list.