DomailfixEmail deliverability checker
Enter your domain to check everything that decides whether your emails land in the inbox: SPF, DKIM, DMARC and mail servers (MX), plus BIMI and MTA-STS. Each problem comes with the fix.
Questions and answers
Why do SPF, DKIM and DMARC matter?
They prove an email really comes from your domain. Since 2024 Gmail and Yahoo require all three from anyone sending in bulk, and emails without them are far more likely to go to spam.
Is this check free?
Yes. It only reads your domain's public DNS records and never sends an email.
I fixed a record. Why does it still show the old one?
DNS changes can take up to a few hours to spread. Results here are also kept for 15 minutes; check again a little later.
More free tools
SPF checkerCheck your SPF record for errors, the 10 DNS lookup limit, duplicate records and unsafe settings like +all.DMARC checkerCheck your DMARC record and policy (none, quarantine or reject), report addresses and common mistakes.DKIM checkerFind a domain's DKIM keys under common selectors (Google, Microsoft 365, Zoho and more) or your own selector, and check the key strength.MX lookupSee which mail servers receive email for a domain, their IP addresses, reverse DNS and the email provider (Google Workspace, Microsoft 365, Zoho and more).Blacklist checkerCheck if your domain or mail server IP is on Spamhaus, SpamCop, Barracuda and other email blacklists.