Tool World
Email Tools
Free online Email tools on Tool World. Browse every Email utility by subcategory — no signup required.
DNS
DKIM Checker
Look up a DKIM public key for selector._domainkey.domain.
Validation
Disposable Email Checker
Check if an email domain is a known disposable provider.
Email Validator
Validate email address syntax locally (no mailbox/MX checks).
Deliverability
Email Deliverability Test
Check MX, SPF, and DMARC DNS setup for a sending domain.
Email Spam Score Checker
Score raw email headers/body for common spam signals.
Diagnostics
Email Header Analyser
Parse raw email headers and surface SPF/DKIM/DMARC and spoof hints.
SMTP Tester
Probe SMTP ports on a domain’s primary MX host.