---
title: "DNS MX record check — Lemwatch Help"
description: "Monitors MX records so a fat-fingered mail edit or expired provider does not silently break customer email."
canonical: "https://lemwatch.com/help/dns-mx-record-check"
source: "https://lemwatch.com"
---

# 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.

## Related

- DNS A record change check

- SPF record check

- DMARC record check


## Related

- [Help centre](https://lemwatch.com/help)
- [DNS A record change check](https://lemwatch.com/help/dns-a-record-change-check)
- [SPF record check](https://lemwatch.com/help/spf-record-check)
- [DMARC record check](https://lemwatch.com/help/dmarc-record-check)
- [DNS NS record check](https://lemwatch.com/help/dns-ns-record-check)
- [Whois & domain expiry check](https://lemwatch.com/help/whois-and-domain-expiry-check)
- [Lemwatch pricing](https://lemwatch.com/pricing)
- [DNS Diagnostics](https://lemwatch.com/help/dns-diagnostics)