How to use the dns record builder
- Pick the record type tab: SPF, DMARC, DKIM, MX or PTR.
- Fill in the required fields. The tool emits a syntactically correct TXT or RR string.
- Paste straight into your zone file.
DNS Record Builder
Create DNS zone records for common record types. Enter your domain and add records.
Frequently asked questions
What is the difference between SPF softfail and hardfail?
~all (softfail) tells receivers 'probably not legit, but you decide'. -all (hardfail) tells them 'definitely not legit, reject'. Use softfail while rolling out, hardfail once stable.
Why is DMARC needed if SPF and DKIM already exist?
SPF and DKIM verify the sending domain but do not say what to DO on failure. DMARC ties them together with a policy (none / quarantine / reject) and reporting addresses.
How do I set up a wildcard MX record correctly?
Use a wildcard record only if you genuinely want every subdomain to share an MX. Most spam-prevention guidance is to set MX explicitly per active subdomain instead.
What does a proper PTR record look like?
For 198.51.100.42 the PTR lives at 42.100.51.198.in-addr.arpa and resolves to a hostname. Mail servers expect a forward-and-reverse match before accepting connections.