DNS & Email Trust
low Severity
Free Check

Mail Server (MX) Security Records

Inspects MX records to ensure valid mail routing configuration and detect dormant or dangling mail server pointers.

Test Your Website for Mail Server (MX) Security Records

Run this check along with 90+ automated tests across your domain.

Why It Matters

Misconfigured MX records cause business email outages or permit attackers to register expired mail relay domains.

How We Check This

We resolve DNS MX records and verify that each mail exchange host resolves to active IP addresses.

How to Fix & Implement

Copy-paste configuration blocks tailored for your web server or edge proxy.

nginx snippet
# Configure valid MX records pointing to your email service provider

Frequently Asked Questions

What if our domain does not send or receive email?

Publish a null MX record (".") and SPF "v=spf1 -all" to block all email impersonation.