Free email tools

Simple, free, no-signup tools by MailTester Ninja. Nothing stored.

Full report

complete report & score /100 for a domain or IP, emailable as PDF

Record lookups & checkers

SPF Checker	validate an SPF record (~all/-all, 10-lookup limit)
DMARC Checker	read a DMARC policy (p=none/quarantine/reject)
DKIM Checker	find & validate DKIM keys across selectors
MX Lookup	list a domain's mail servers & priorities
Reverse DNS Lookup	PTR record & FCrDNS for an IP or MX
MTA-STS Checker	MTA-STS policy & TLS-RPT record
Blocklist Checker	is an IP or domain on Spamhaus, SpamCop, Barracuda?
DNS Lookup	A, AAAA, NS and SOA at a glance

Generators & analyzers

Email Authentication Checker	score & explain MX/SPF/DMARC + fixes
SPF & DMARC Generator	build your SPF/DMARC records in seconds
Deliverability Analyzer	quick MX · SPF · DMARC of any domain

Data · Email checker · Email verifier · Blocklist checker · Blocklists explained · Widget

Built & updated automatically by MailTester Ninja, the email verifier that stores nothing. DNS-only, aggregate data, no personal information. · JSON API · RSS