MailSure

Is guerrillamail.biz a valid email domain?

DisposableChecked 2026-11-06

guerrillamail.biz can receive email. It publishes 1 mail server, and the first choice is mail.guerrillamail.biz.

It appears on our list of disposable and throwaway email domains.

No SPF record was found. No DMARC policy was found either.

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MX records

PriorityMail serverResolves to
1mail.guerrillamail.biz178.162.170.166

SPF

No record found

DMARC

No record found

Disposable?

Yes, listed as a disposable email domain.

Free provider?

Yes, a free public mailbox provider.

What this means for your email list

Should you accept addresses at this domain?

Treat these as low-value. People use guerrillamail.biz to avoid giving a real address, so the contact is unlikely to reply, buy or come back. A real-time check at signup stops them before they enter your list.

Sender authentication

guerrillamail.biz has no DMARC policy, so receivers have no instruction on what to do with mail that fails authentication. Large mailbox providers now expect bulk senders to publish one.

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Frequently asked questions

Is guerrillamail.biz a valid email domain?
Yes. guerrillamail.biz 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 guerrillamail.biz a disposable email domain?
Yes. guerrillamail.biz is on our list of disposable and temporary email domains, so most services block it.
What are the MX records for guerrillamail.biz?
mail.guerrillamail.biz (priority 1).
Does guerrillamail.biz have SPF and DMARC?
SPF: no record found. DMARC: no record found.

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