If a given domain does not have an SPF record, have a command-line option that would support checking the parent domain for an SPF record and report results. In other words, if there's no SPF record for the given domain, try the parent. If the parent has a SPF record, use that.
If a given domain does not have an SPF record, have a command-line option that would support checking the parent domain for an SPF record and report results. In other words, if there's no SPF record for the given domain, try the parent. If the parent has a SPF record, use that.