11 Record Types · Email Health · Free
DNS & Record Checker
Query all DNS records for any domain — A, MX, NS, TXT, SPF, DMARC, CAA — and diagnose email deliverability in seconds.
A / AAAA / MX
NS / SOA / CNAME
SPF & DMARC
CAA / TXT
Email health
e.g.
google.com
github.com
coverters.com
amazon.com
What are DNS records used for?
A & AAAA Records
Map a domain name to an IP address (A for IPv4, AAAA for IPv6). This is the base record that lets browsers find your server.
MX — Mail Server
Specifies which mail server receives emails for this domain. Multiple MX records define priority (lower value = higher priority).
SPF, DMARC & DKIM
The three pillars of email authentication. SPF authorises sending servers, DKIM cryptographically signs messages, DMARC defines the policy on failure.
CAA — Certificate Authority
Controls which certificate authorities can issue SSL certificates for your domain. Prevents fraudulent certificate issuance.
FAQ
TTL (Time To Live) indicates in seconds how long a DNS record can be cached by resolvers. A short TTL (300s) allows quick changes but increases DNS load. A long TTL (86400s = 24h) reduces load but slows down propagation of changes.
The main causes are: missing or misconfigured SPF, absent DMARC, unsigned DKIM. Use this tool to verify your domain has a valid SPF record (v=spf1...), a DMARC record (v=DMARC1;p=quarantine or reject) and ideally DKIM signing.
DNS propagation typically takes between 15 minutes and 48 hours, depending on the old record's TTL and the behaviour of different resolvers worldwide. To speed up propagation, lower the TTL to 300 seconds 24 hours before the change.