Tools
Diagnostic tools for small business technology
Free utilities for checking the boring-but-critical parts of your setup: DNS, email, security hygiene. No signup, no fluff, results in plain English.
Email
MX Lookup
See which servers handle your domain's email, with a verdict for each.
Email
SPF Check
Find out if your domain is letting email impersonators through.
Email
DMARC Check
See what happens to email that tries to impersonate your domain.
Email
DKIM Check
Confirm your outgoing email is cryptographically signed and verifiable.
DNS
DNS Lookup
Check A, AAAA, MX, TXT, NS, and CNAME records for any domain.
Security
Blacklist Check
See if your domain or mail server is on an email blacklist.
Security
WHOIS Lookup
See who registered a domain, when it expires, and whether it's protected.