Server-side diagnostic
Email Syntax & Domain MX Checker
Validate email address syntax and inspect domain MX / SPF TXT records. Explicitly does not verify mailbox existence or deliverability.
Scope notice: Checks syntax and public DNS MX/SPF records only. Does not verify mailbox existence or deliverability.
How It Works
Enter an email address or domain to verify RFC-style syntax and check whether the domain publishes mail exchange (MX) records.
Frequently Asked Questions
- Does this prove an inbox exists or will accept mail?
- No. Checking syntax and MX records confirms domain mail routing configuration only, not individual mailbox existence or deliverability.