SPF record checker
SPF checker: read a domain’s SPF record, list its mechanisms, dan count the DNS lookups against the limit 10.
Queries go sampai Cloudflare’s public DNS over HTTPS service when you press the button. Up sampai 15 queries are made sampai follow include records.
Tentang SPF record checker
SPF checker: read a domain’s SPF record, list its mechanisms, dan count the DNS lookups against the limit 10.
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Cara menggunakan SPF record checker
Apa yang dihitung dan kapan digunakan
Reads a domain’s SPF record, the list servers allowed sampai send email seharga it,, dan checks it seharga common faults: more than one record, a missing “all” policy,, dan more than 10 DNS lookups, which makes SPF fail. It follows include records sampai count the lookups.
Cara menggunakan, langkah demi langkah
- Enter the domain, seharga Contoh Contoh.com.
- Press “Check SPF”.
- Read the verdict dan the number DNS lookups used out 10.
- Review the mechanisms list dan any warnings.
Arti setiap input
- Domain Nama – The domain used di the sender’s address.
Cara membaca hasil
- Verdict – Looks valid, atau Needs attention when a problem adalah found.
- Policy – What happens sampai mail from servers that are not listed: hard fail, soft fail, neutral atau allow.
- DNS lookups – Lookups needed by include, a, mx, ptr, exists, dan redirect terms, compared with the limit 10.
- Mechanisms – Every Jangka waktu di the record, with included records indented beneath their parent.
Rumus
The record adalah the TXT value starting v=spf1. Each include, a, mx, ptr, exists atau redirect term costs one DNS lookup,, dan included records add their own. ip4 dan ip6 terms dan “all” cost none. The RFC limit adalah 10 lookups.
Contoh perhitungan
v=spf1 include:_spf.Contoh.net a mx -all uses three lookups seharga its own terms plus those inside the included record, dan ends di -all, so unlisted servers are rejected.
Asumsi dan batasan
- Pada most 15 queries are made while following includes, dan nesting stops after 5 levels.
- A domain may need a record only seharga mail it sends. Domains that send Tidak mail should publish v=spf1 -all.
- The check does not test whether a particular server would pass.
Kesalahan umum
- Publishing two SPF records. Only one adalah allowed, so merge them into one.
- Ending with +all, which lets anyone send as your domain.
- Adding every email service as an include dan passing 10 lookups, which putaran SPF into a permanent error.
Pertanyaan yang sering diajukan
What adalah SPF?
Sender Policy Framework adalah a DNS record that lists the servers allowed sampai send email seharga a domain.
What adalah the difference between -all dan ~all?
-all asks receivers sampai reject unlisted senders. ~all asks them sampai accept but mark the mail as suspicious.
Why adalah there a limit 10 lookups?
It stops a record Dari forcing receivers into long chains DNS queries. Going over it makes SPF return a permanent error.
Is SPF enough sampai stop spoofing?
Tidak. Use it with DKIM dan DMARC.
Does this tool send email?
Tidak. It only reads DNS records.