Contributed by Peter N. M. Hansteen on from the check-my-senders dept.
Now OpenBSD offers a straightforward mechanism to do that and fill your nospamd table, right from the smtpctl utility via the subcommand spf walk. Gilles Chehade (gilles@) describes how in a recent blog post titled spfwalk.
This feature is still in need of testing, so please grab a snapshot and test!
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