← Back to all services
Mail & DNS
Deliverability, reputation, DNS policy, and SMTP diagnostics for production domains.
Blacklist Check
Check IPs and domains against real DNSBL sources used in email reputation workflows.
ip blacklist check • dnsbl check • email reputation
Open service →
MX Lookup
Query MX records in priority order, then resolve mail hosts and supporting policy records.
mx lookup • mail exchanger • spf lookup
Open service →
DMARC Check
Parse a live DMARC record, validate policy tags, and flag misconfigurations.
dmarc check • dmarc validator • email auth
Open service →
SMTP Diagnostics
Probe a live mail server over SMTP ports and inspect banner and encryption support.
smtp diagnostics • starttls test • mail server test
Open service →
Email Health
Validate MX, SPF, DMARC, DKIM, MTA-STS, TLS-RPT, BIMI, CAA, and DNSSEC signals for a domain.
email health • spf dkim dmarc • deliverability audit
Open service →
Analyze Headers
Paste raw email headers to parse SPF, DKIM, DMARC, ARC, and source IPs.
email header analyzer • authentication-results parser
Open service →