HeloHub

Email Auth

MX LookupSPF LookupDKIM LookupDMARC LookupPTR RecordHeader Analyzer

DNS Records

A RecordAAAA RecordCNAME RecordNS RecordTXT RecordSOA RecordSRV RecordCAA Record

Security

Blacklist CheckDNSBL Directory

EMAIL & DNS TOOLKIT

Diagnose Your Email & DNS Config

MX, SPF, DKIM, DMARC lookup, DNS record queries
blacklist detection β€” all in one place

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Look up MX records...
email-auth
MX Lookup
Look up mail exchange servers
SPF Lookup
Check SPF records and validate syntax
DKIM Lookup
Verify DKIM signature records
DMARC Lookup
Check DMARC policy configuration
PTR RecordReverse DNS lookup
Header AnalyzerParse and analyze email headers
Blacklist CheckRUN CHECK β†’
dns-records
A Record
IPv4 address lookup
AAAA Record
IPv6 address lookup
CNAME Record
Canonical name record lookup
NS Record
Name server lookup
TXT RecordText record lookup
SOA RecordStart of authority record lookup
SRV RecordService locator record lookup
CAA RecordCertificate authority authorization

Quick Lookup

Enter a domain to instantly check MX, SPF, DKIM, DMARC and more β€” results displayed in real time

Full DNS Support

Supports A, AAAA, CNAME, NS, TXT, SOA, PTR, SRV, CAA β€” 9 record types covering all common DNS queries

Blacklist Detection

Bulk check if an IP or domain is listed in Spamhaus, SpamCop and other major blacklist databases