Free forever
Email deliverabilitytoolbox.
Free tools to help you set up and debug email authentication. No account required.
No account. No quota. Every tool below is free.
Checkers
DNS generators
Once is not a watch
These tools answer right now. A plan re-checks every 6 hours and emails you when the answer changes.
Free tools
What these tools will and won't do.
Are the free tools really free?
Yes. The SPF, DKIM and DMARC generators, the SPF flattener, the email header analyzer, the email health check and the blocklist checker all run without an account and without a quota.
Which free tools are available?
Seven: an SPF record generator, a DKIM record generator, a DMARC record generator, an SPF flattener, an email header analyzer, an email health check and a blocklist checker.
Is there a free email deliverability test?
The free email health check is the closest thing. It reads your SPF, DKIM and DMARC records and checks common DKIM selectors. It does not send a seed message, so it does not report inbox placement.
What do the free tools not do that a paid plan does?
The tools answer a question once, right now. A plan answers it every 6 hours, keeps the dated history, reads your DMARC reports, and tells you when the answer changes.
This answers once. Monitoring answers every 6 hours.
LitInboxes re-checks DNS, DMARC, and blocklists on a schedule and emails you when the answer changes. Start with a 14-day free trial.
14-day free trial · no credit card · cancel anytime