MXToolbox Alternatives: DNS & Email Toolbox
MXToolbox has led DNS/MX/blacklist checking since 2006, but since 2024 its free tier is capped at 3 checks per day without login and full API is Pro-only ($99/month). Alternatives: Enterno.io DNS (A, AAAA, MX, TXT, DKIM, SPF, DMARC free, API on Pro), intoDNS (DNS-only), DNSChecker.org (propagation focus), Google Digdug.
Below: competitor overview, feature-by-feature comparison, when Enterno.io wins, FAQ.
About the Competitor
MXToolbox launched in 2006. Core feature: blacklist monitoring (100+ RBLs), MX lookup, SPF/DKIM/DMARC analyzer. Pro plan ($99+/mo) adds: API, 30+ server monitoring, blacklist alerts. Free tier is heavily rate-limited in 2026.
Enterno.io vs Competitor — Feature Comparison
| Feature | Enterno.io | Competitor |
|---|---|---|
| All DNS record types (A/AAAA/MX/TXT/CAA/CNAME) | ✅ | ✅ |
| Free unlimited checks | ✅ (30/min) | ❌ (3/day) |
| Blacklist check (RBL) | ⚠️ Partial | ✅ (100+) |
| SPF/DKIM/DMARC validator | ✅ | ✅ |
| DNS propagation check | ✅ (global) | ✅ |
| API without Pro | ✅ | ❌ Pro only |
| Uptime monitoring | ✅ (built-in) | ✅ |
| Pro price | ₽490/mo | $129/mo |
When to Pick Enterno.io
- You need frequent automated DNS checks — MXToolbox caps at 3/day, Enterno gives 30/min free
- You serve Runet — Enterno.io has Moscow vantage points, MXToolbox is sometimes throttled
- You have a ruble budget — Enterno Pro ₽490 vs MXToolbox Pro $129
- If you need deep RBL monitoring — MXToolbox specialises in that
Why teams trust us
How it works
Enter domain
Select record type
Get DNS response
What are DNS Records?
DNS (Domain Name System) translates domain names into IP addresses. DNS records are instructions that define where to route traffic, email, and how to verify domainownership.
Complete Lookup
Query all record types — A, AAAA, MX, NS, TXT, CNAME, SOA — in a single request.
Instant Results
Direct queries to authoritative servers. Results in milliseconds, no caching.
Security Checks
SPF, DKIM, and DMARC analysis to evaluate email protection against spoofing and phishing.
Export & History
Save check results. Compare DNS records before and after registrar changes.
Who uses this
DevOps
DNS check after deploy
Email marketers
SPF/DKIM/DMARC audit
SEO
DNS config audit
Sysadmins
DNS zone control
Common Mistakes
v=spf1 TXT record.Best Practices
Get more with a free account
DNS check history, API keys and DNS change monitoring.
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How-to
Frequently Asked Questions
Can Enterno.io fully replace MXToolbox?
For most tasks — yes (DNS, SPF, DKIM, DMARC, uptime). Exception: blacklist monitoring across 100+ RBLs — Enterno covers only the top 20. For deep antispam auditing MXToolbox is stronger.
Does MXToolbox have a free API?
No. API is Pro-only ($99/mo). Enterno.io exposes the API on Pro (₽490/mo) + a free tier at 10 req/min.
What is DNS propagation?
The process of pushing DNS changes through resolver caches worldwide. Usually 24-48 hours (per TTL). <a href="/en/s/research-dns-propagation-benchmark-2026">Our benchmark</a> showed a 4.5 h median.
How do I monitor blacklists with Enterno?
Dashboard → Monitors → New → choose type "Blacklist". Checks every 30 min across top-20 RBLs (Spamhaus, SORBS, Barracuda, etc.).