Email only lands if the receiving side trusts you: the right MX, an SPF record that doesn’t blow the 10-lookup limit, DKIM signatures, an enforced DMARC policy, a clean IP reputation and TLS in transit. Miss one and your mail quietly goes to spam | or someone spoofs your domain. These tools check every layer for the one domain you name, live and explained, and hand you the fix. Same public data mxtoolbox uses, but private, ad-free, and read as one honest verdict instead of twenty separate lookups.
Mail Health Report
One domain in → a single A–F deliverability & DNS-health score, every finding explained, with a shareable link that re-runs for whoever opens it.
Guides: Email authentication setup by provider · Fix common email errors (SPF too many lookups, DMARC p=none…) · Email blocklist directory.
All Deliverability tools
12 toolsMail Health Report
One domain in, an A–F email deliverability & DNS health score out, SPF, DKIM, DMARC, MX, DNSSEC, blacklist and TLS in one shareable report.
SuperCheck
One box for every lookup: type mx:, spf:, dmarc:, blacklist:, dns:, whois: or a bare domain for the full report.
Email Security Analyzer
SPF, DKIM, DMARC, MTA-STS, BIMI in one report.
MX Lookup
Find and test the mail exchangers for a domain.
SPF Record Generator
Build a valid SPF TXT record visually.
DMARC Record Generator
Generate a DMARC policy with reporting.
Blacklist (DNSBL) Checker
Check an IP or domain against major RBL blocklists.
DNSSEC Checker
Verify a domain is signed and the chain validates.
DNS Lookup
Query A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV records.
Reverse DNS (PTR)
Resolve an IP address back to its hostname.
SSL/TLS Checker
Certificate chain, expiry, protocols and issues.
WHOIS Lookup
Registration, registrar and expiry for domains and IPs.