Verify DNS records
Verify zone authority, MX/address records, and authentication-related TXT publications.
Objective
Verify authoritative mail DNS
Confirm authoritative servers publish correct mail-related DNS data.
Starting state
Sending domain is configured or about to send
Prerequisites
- Domain name
- Expected record inventory
Estimated time
1–2 hours
Difficulty
intermediate
Required access
- Public DNS query tools
Inputs
- Domain
- Expected MX and TXT records
Step-by-step instructions
- Check delegation and NSConfirm NS delegation and authoritative servers.
- Check MX and addressesValidate MX targets and host address records.
- Check authentication TXTConfirm SPF/DMARC TXT publications as applicable.
Verification
- Authoritative answers match the inventory
Common mistakes
- Authoritative NXDOMAIN for required names
- Whether PTR/rDNS is in scope for the send path
Rollback / recovery
- N/A — verification only
Expected outcome
Mail DNS inventory is confirmed at the authority.
When to escalate
- Authority servers disagree