Re: [Exim] SMTP+SPF

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Autor: David Saez
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A: Matthew Byng-Maddick
CC: exim-users
Assumpte: Re: [Exim] SMTP+SPF
Hi !!

> organisations. Also, it doesn't scale well for any organisation who respond
> to load by bringing other machines online. There appears to be no provision
> for killing the SPF querier by doing recursive SPFincludes, with no actual
> data. As far as I can tell, David Saez's ACL falls to this attack.


exim acl recursion is limited to 20 iterations, so there is no way to
produce any damage to a Exim server. Nevertheless there will be no
recursion if there is no real recursive SPFIncludes published. No data
produces no recursion.

> This is
> also by no means the first time that something like this has been mooted,
> and every time, it's rejected, mainly because of the enormous amount of work
> it requires (both to set up and to maintain).


It took me 10 minutes to publish spf info for about 200 domains. I also
do not understand your objections to how spf scales. As I know you could
spf-allow a whole C class with a single line of configuration.

--
Best regards ...

Does fuzzy logic tickle?

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