Free tools
Check your email setup
The same checks I run before every client call, free to use. No sign-up, nothing is kept beyond an hour, and the bounce decoder never leaves your browser.
Check a domain
SPF with the full lookup tree, DMARC policy and reporting, MX, MTA-STS and a scan of common DKIM selectors. Findings ranked by severity.
Check a domain →Check an email
Send any email to a one-off address, or paste a message source, and see how it authenticates: SPF, every DKIM signature verified, DMARC alignment, reverse DNS and one-click unsubscribe.
Check an email →Decode a bounce
Paste a bounce from Gmail, Microsoft, Yahoo, iCloud or your provider and get a plain-English explanation: who rejected it, why, and what to do next.
Decode a bounce →Found something you can't explain?
Book a free 20-minute review. I'll look at the results with you and tell you what to fix first, whether or not we work together.