MailSure

Is gmx.co.uk a valid email domain?

Free providerChecked 2026-11-06

gmx.co.uk has working mail routing: 2 MX records pointing, led by mx01.gmx.net.

It is a free, public mailbox provider, and it is not on our disposable list.

SPF is published. DMARC is set to quarantine.

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MX records

PriorityMail serverResolves to
10mx01.gmx.net213.165.67.123
10mx00.gmx.net212.227.15.150

SPF

Record published

v=spf1 redirect=_spf.gmx.net

DMARC

Policy: quarantine

v=DMARC1; p=quarantine; rua=mailto:dmarcreport@gmx.net

Disposable?

No, not on our disposable list.

Free provider?

Yes, a free public mailbox provider.

What this means for your email list

Is a free-provider address a problem?

Not by itself. gmx.co.uk is a normal mailbox provider used by real people, and mail to it is delivered reliably. The thing to watch is whether the specific mailbox exists, which a domain check cannot tell you, so verify each address.

Sender authentication

gmx.co.uk uses a DMARC quarantine policy: mail that fails authentication is sent to spam. That is a sound middle step, and a good sign the owner looks after their email setup.

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Frequently asked questions

Is gmx.co.uk a valid email domain?
Yes. gmx.co.uk publishes 2 MX records and can receive email. Whether a particular mailbox exists is a separate question that only a mailbox check can answer.
Is gmx.co.uk a disposable email domain?
No. gmx.co.uk is not on our disposable list, but it is a free public provider. The list is updated regularly, and new throwaway domains appear all the time.
What are the MX records for gmx.co.uk?
mx01.gmx.net (priority 10); mx00.gmx.net (priority 10).
Does gmx.co.uk have SPF and DMARC?
SPF: yes. DMARC: yes, policy quarantine.

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