On February 24, 2020 4:30:37 AM UTC, Mohamed Lrhazi <lrh...@gmail.com> wrote:
>Thanks all,
>
>My question still was: Suppose I comply with all the recommendations
>and
>best practices in composing my SPF records... Do I still need to worry
>about the number of IP addresses (v4/v6/ciders) that I put in each
>record?
>
>I guess if I could really stick with sub 512 bytes records, I could not
>put
>more than 20ish ip4 mechanisms and even less if including ip6 ones. And
>using includes I could not have more than 10 of such records.

I think if Google can manage to describe their outgoing mail architecture 
within those limits, most everyone else can too.  In the cases I've 
investigated where providers weren't it's always been a matter of poor record 
maintenance, not inherent limits being a problem.

That said, the spf-discuss mailing list is probably a better place to argue 
details of SPF protocol design.

Scott K

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