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

Where to find it in Lemwatch

Site details → Health → DNS tab → Mail.

How to respond

  1. Confirm the new MX matches your mail provider (Google, Microsoft 365, Fastmail).
  2. If zero-MX, restore records from your registrar backup.
  3. Send a test email through a monitored inbox.
  4. Update SPF to include the new mail provider (see SPF record check).
  5. 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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