Diagnose DNS & email issues in seconds
Seventeen precision tools for DNS records, SPF, DKIM, DMARC, blacklists, and email headers. Free, no signup, server-side lookups against trusted resolvers.
What is no-reply.email?
no-reply.email is a free toolkit for diagnosing domains — DNS and email alike. Inspect any record type with the domain report and dig tools, watch changes propagate across global resolvers, and check the records that decide whether your mail gets delivered — SPF, DKIM, DMARC, MX, and more. Every result is explained in plain English with the exact fix when something's wrong. Lookups run server-side over DNS-over-HTTPS against trusted public resolvers, so you see what the wider internet sees rather than your local cache.
Get started
Check the records that shape your domain — DNS health, authentication, deliverability. Enter a domain and get an annotated answer in seconds.
DNS Lookup
NewEvery record type for a domain in one query — A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, SRV, and DMARC — with TTLs and plain-English annotations.
All tools
Authentication
Validate SPF syntax, count DNS lookups, flag risky mechanisms.
Fetch any selector's key and verify it's present and strong.
Analyze policy, alignment, and reporting configuration.
Build a correct SPF record interactively.
Compose a DMARC policy with sane defaults.
Assemble a DKIM DNS record from your public key.
DNS & Validation
A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, SRV, DMARC — one query.
Mail routing with priorities and resolved IPs.
Logo record and DMARC readiness check.
Syntax, MX, disposable and role-account checks.
Test against 12 major DNS blocklists.
Compare answers across 8 public resolvers.
Classic dig output for any record type, over DoH.
Nameservers, SOA, and registration data.
PTR records with forward-confirmation.
Frequently asked questions
Are these DNS and email tools really free?
Yes. Every tool on no-reply.email is free to use, with no signup, no account, and no usage tiers. Fair-use rate limits apply to keep the service fast for everyone.
How do I check if my SPF record is valid?
Enter your domain in the SPF Checker. It fetches your TXT record live from DNS, validates the syntax, counts DNS lookups against the RFC limit of 10, and flags risky mechanisms like '+all'.
Why is my email going to spam?
The most common causes are missing or misconfigured SPF, DKIM, or DMARC records, a sending IP on a blacklist, or missing reverse DNS. Run your domain through the authentication checkers and the Blacklist Checker to narrow it down in minutes.
What is a DKIM selector?
A selector is the label that identifies which DKIM key a message was signed with — for example 'google' or 's1'. It appears in the DKIM-Signature header as 's=' and points to the DNS record at selector._domainkey.yourdomain.com.
Where do the DNS lookups run?
All lookups run server-side against trusted public resolvers such as Google, Cloudflare, and Quad9 — so results reflect what the wider internet sees, not your local cache.
Do you store the domains or emails I look up?
Lookups are processed in memory to produce your result and protected by rate limiting. See our Privacy page for full details on what is and isn't retained.