Free tools
SOA record lookup
Enter the domain whose DNS zone you want to inspect.
What this checks
Primary nameserver (MNAME), admin contact (RNAME), serial, refresh, retry, expire, and minimum TTL.
Why it matters
SOA defines zone authority and timing. Unexpected SOA changes or stale serials can indicate DNS propagation or configuration issues.
Results
Common issues
- Unexpected SOA serial changes indicating unauthorized DNS edits.
- Short negative TTL values causing resolver churn.
- Migrating zones without updating SOA and NS delegation together.
How to fix
- Compare SOA serial and nameservers against your DNS provider dashboard.
- Coordinate SOA updates with authentication record changes.
- Re-run TXT and MX lookups after zone migrations.
How MailFleet helps
After DNS provider changes, verify SOA and authentication records before resuming high-volume MailFleet sends.
Related free tools
Delivery note: MailFleet helps users manage campaigns through their own sending providers. Delivery outcomes depend on sender reputation, DNS authentication, content quality, recipient engagement, list quality, provider rules, and mailbox filtering systems.
For regulatory context on commercial email in the United States, see the FTC CAN-SPAM compliance guide.
Frequently asked questions
Email authentication records depend on reliable DNS hosting. SOA helps confirm which nameserver is authoritative after migrations.
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