TXT lookup
List all TXT records for a domain, including SPF, verifications and more.
About TXT lookup
What it is
TXT records are free-text records in DNS used for many things: SPF, DMARC, domain verifications for various services and other metadata.
Why it matters
The TXT records give a quick overview of what is configured on the domain, and reveal both important security records and old verifications that can be cleaned up.
Tips
- Remove old verification records from services you no longer use.
- Make sure there is only one SPF record, multiple ones break the standard.
- Document what each record is for.
Common questions
What are TXT records used for?
Among other things SPF, DMARC, DKIM-related data and domain verifications for cloud services.
Can you have multiple SPF records?
No, there should only be one SPF record per domain. Multiple records cause SPF to stop being valid.
More lookups
MX lookup
See which servers receive mail for a domain, and which provider handles it.
SPF check
Check whether a domain has an SPF record and how strictly it rejects spoofed mail.
DMARC check
See whether a domain has DMARC and which policy it uses against spoofed mail.
DKIM check
Look for DKIM signing on a domain using the most common selectors.
DNSSEC check
See whether a domain is protected with DNSSEC, that is, whether its DNS answers are signed.
NS lookup
See which name servers control a domain's DNS.
Blacklist check
Check whether a domain's IP address is on blacklists such as Spamhaus, Barracuda and SpamCop.
A/AAAA lookup
See which IP addresses a domain points to, both IPv4 (A) and IPv6 (AAAA).
CNAME lookup
See whether a domain is an alias that points on to another domain.
SOA lookup
See the zone's core data: primary name server, contact and serial number.
CAA lookup
See which certificate authorities are allowed to issue certificates for the domain.
Reverse DNS (PTR)
Look up which host name a domain's IP address points back to.
MTA-STS
See whether a domain requires encrypted mail delivery via MTA-STS.
TLS-RPT
See whether a domain receives reports about failed encrypted mail delivery.
BIMI
See whether a domain publishes a logo that can be shown in the recipient's inbox.
SSL certificate
Check a domain's TLS certificate: issuer, validity and expiry.
Whois
See who owns a domain, when it was registered and when it expires.
HTTP security headers
Check whether a domain's website sets important security headers.