Free Tools
Email Tools
Check SPF, DKIM, DMARC, and MX records for email deliverability and security.
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Why Your Emails Land in Spam
Gmail, Outlook and Yahoo decide whether to trust an email largely by checking three DNS records: SPF, DKIM and DMARC. If they are missing or wrong, invoices and password resets go to spam - or anyone can send mail pretending to be you. These tools read those records and explain what they mean.
Check each one with the SPF Checker, DKIM Checker and DMARC Checker, or get all of them at once with the Email Security Summary. When you are ready to publish a policy, the DMARC Record Generator writes the TXT record for you.
When Email Is Not Arriving at All
- The MX Record Lookup and Mail Server Lookup show which servers receive mail for a domain.
- The SMTP Connectivity Checker tests whether those servers answer on the standard mail ports.
- The Email Header Analyzer reads a raw message and shows its path and authentication results.
New to these records? Read SPF, DKIM and DMARC explained.