v=spf1 include:_spfblocka.toast.com ~all
SPF Validation Success
is displayed.Section 10.1 "Processing Limits" of RFC 4408 specifies inter-DNS Lookup processing protocol.
SPF implementations MUST limit the number of mechanisms and modifiers that do DNS lookups to at most 10 per SPF check, including any lookups caused by the use of the "include" mechanism or the "redirect" modifier. If this number is exceeded during a check, a PermError MUST be returned. They "include," "a," "mx," "ptr" and "exists" mechanisms as well as the "redirect" modifier do count against this limit. The "all," "ip4" and "ip6" mechanisms do not require DNS lookups and therefore do not count against this limit. The "exp" modifier does not count against this limit because the DNS lookup to fetch the explanation string occurs after the SPF record has been evaluated.
This call contains all queries triggered by the "include" mechanism or "redirect" modifier. If the NHN Cloud Email's spf record v=spf1 include:_spfblocka.toast.com ~all
exceeds DNS Lookup interaction protocol, it may be processed as spam.