MailSure

Is xs4all.nl a valid email domain?

Free providerChecked 2026-11-06

xs4all.nl can receive email. It publishes 1 mail server, and the first choice is mx.kpnmail.nl.

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

SPF is published and ends with ~all. DMARC is set to reject.

Check an email address at xs4all.nl

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MX records

PriorityMail serverResolves to
10mx.kpnmail.nl195.121.65.158

SPF

Record published

v=spf1 include:spf.ews.kpnxchange.com ~all

DMARC

Policy: reject

v=DMARC1; p=reject; adkim=r; aspf=r; rua=mailto:dmarc@kpnmail.nl

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?

Addresses at xs4all.nl are legitimate and deliverable in general. What goes wrong is the mailbox part before the @: typos, old accounts and abandoned inboxes. That is what per-address verification catches.

Sender authentication

xs4all.nl has a strict DMARC policy (reject): mail that fails authentication is refused, which protects its brand from spoofing and means anyone sending as xs4all.nl must have SPF and DKIM set up correctly.

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Frequently asked questions

Is xs4all.nl a valid email domain?
Yes. xs4all.nl publishes 1 MX record and can receive email. Whether a particular mailbox exists is a separate question that only a mailbox check can answer.
Is xs4all.nl a disposable email domain?
No. xs4all.nl 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 xs4all.nl?
mx.kpnmail.nl (priority 10).
Does xs4all.nl have SPF and DMARC?
SPF: yes, ending ~all. DMARC: yes, policy reject.

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