Free DNS Lookup Tool
Look up MX, A, CNAME, TXT, and NS records for any domain. See exactly how your domain is configured.
How it works
Enter a domain name
Any domain. We query the authoritative nameservers directly.
We fetch all DNS record types
MX, A, AAAA, CNAME, TXT, and NS records retrieved in parallel.
See your full DNS configuration
Every record displayed with type, value, TTL, and priority where applicable.
Why this matters
DNS records control where your email goes and how your domain resolves. Misconfigured MX records mean lost emails. Missing TXT records mean failed authentication. When something breaks in your email setup, DNS is almost always the first place to check.
Watch your DNS around the clock
SendKit monitors DNS records across all your domains and alerts you when anything changes or breaks.
DNS monitoring
Get alerted when any DNS record changes unexpectedly
Security audit
Full DNS security analysis including DNSSEC and CAA records
Propagation tracking
Monitor DNS changes as they propagate across global nameservers
More free deliverability tools
Email & IP Blacklist Checker
Check if your email, IP, or domain is on any blacklist. Scans 50+ databases and shows your health score instantly.
SPF, DKIM & DMARC Checker
Verify your domain email authentication in one click. See which records pass, which fail, and how to fix them.
Email Verifier
Check if an email address is real before you send. Detects invalid mailboxes, catch-all domains, and SEG-protected addresses.
Inbox Placement Test
Test if your emails land in primary, promotions, or spam. Works across Gmail, Outlook, and Google Workspace.
Email Spam Checker
Paste your email copy and get a spam score. We scan for trigger words, formatting issues, and patterns that land you in spam.
Email Signature Generator
Create a professional HTML email signature in minutes. Works with Gmail, Outlook, and Apple Mail.
Email Warmup Calculator
Enter your target sending volume and get a day-by-day warmup schedule. Know exactly how many emails to send each day.
Subject Line Tester
Score your email subject line before you send. Get feedback on length, spam risk, and engagement potential.
Email Header Analyzer
Paste raw email headers and see the full routing chain, authentication results, and delivery delays in a readable format.
Domain Age Checker
Check how old any domain is. See registration date, expiry date, and registrar info. Domain age matters for email deliverability.
Email Bounce Rate Calculator
Calculate your email bounce rate and compare it against industry benchmarks. See if your list health needs attention.
Email Open Rate Calculator
Calculate your email open rate and benchmark it against industry averages. See how your campaigns compare.
Cold Email Mailbox Calculator
Enter your target replies and meetings. We calculate the exact number of mailboxes, domains, and daily sends you need.
Got questions? We've got answers.
MX (Mail Exchange) records tell other servers where to deliver email for your domain. They point to your email provider (Gmail, Outlook, etc.) and include priority values that determine the order of delivery attempts.
Ready to hit primary?
Set up SendKit's isolated infrastructure and start sending in under 15 minutes.
Dedicated IPs on every plan. Cancel anytime.