DNS MX record check
Monitors MX records so a fat-fingered mail edit or expired provider does not silently break customer email.
Quick answer
Lemwatch hashes your MX priority+host set hourly and alerts when it changes or when zero MX records are returned.
What it checks
- All MX hosts with their priorities
- Zero-MX condition (mail delivery will fail)
- Whether MX targets resolve (dangling MX)
- Cross-check against 3 resolvers
Where to find it in Lemwatch
Site details → Health → DNS tab → Mail.
How to respond
- Confirm the new MX matches your mail provider (Google, Microsoft 365, Fastmail).
- If zero-MX, restore records from your registrar backup.
- Send a test email through a monitored inbox.
- Update SPF to include the new mail provider (see SPF record check).
- Acknowledge.
FAQ
Does Lemwatch send real email to test?
No — DNS record inspection only, no mail traffic.
What if I have no MX and use a Null MX?
Null MX (0 .) is recognised and treated as intentional.
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