Diagnostic tools
Every check in one place. Filter by category or search by name.
Email & Deliverability
SPF Lookup
Fetch and parse a domain's SPF record.
Email & Deliverability
DKIM Lookup
Retrieve a DKIM public key by selector.
Email & Deliverability
DMARC Lookup
Read and interpret a DMARC policy.
Email & Deliverability
DMARC Generator
Build a valid DMARC record interactively.
Email & Deliverability
BIMI Lookup
Check for a BIMI brand logo record.
Email & Deliverability
MX Health
Score mail-server configuration and reachability.
Email & Deliverability
SMTP Test
Connect to a mail server and read its banner.
Email & Deliverability
Email Header Analyzer
Parse raw headers into a delivery timeline.