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Hello,
I was logging SPF results, basically made by:
my $q = new Mail::SPF::Query (
sender => $lcSender,
ip => $relay,
helo => $Helo,
myhostname => $me,
);
my $r = ($q->result())[4];
I noticed that lots of users have forwarded mail resulting the query to
return "fail".
So I got the idea to not act on fail, but on "null SPF entries" only.
E.g. to bounce the mail only if
$r->{spf_record} =~ /\Av=spf\S+\s+-all\z/ && $r->{result} eq 'fail'
Does somebody know of a SPF implementation that only checks for "null SPF
entries", aka "v=spf1 -all"? But does support, probably, TXT/SPF RRs and
v=spf2.0 as well?
The idea simply is to avoid unnecessary DNS requests, recursions and
matching, because there is none, except the SPF / TXT retrieval. Maybe
somebody has some statistics about the impact of "complex" SPF rules, how
many are there etc.pp.
Regards,
- --
Steffen Kaiser
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