Slightly off topic. I hope it's OK when the mail is marked as such. I was just wondering if the users of this list use SPF in any way, and if so, to what extend?
My former provider of mail added a header with the SPF-info retrived from DNS, and I'm considering to do the same with "policyd-spf-perl". There is already a running DNS on the system, so the extra lookup should not have a lag. I already have Perl installed through the use of postfixAdmins auto reply script, so it seems natural to choose a solution written in Perl (if a choice exists). The only policy deamon I am currently using is greylisting by SQLGrey. The mailserver only provides me with my personal mail, so the load is very light.