mailbox.org is a free email provider

mailbox.org is a consumer mailbox provider, so anyone can open an address there in a minute.

Free provider

97 /100

Strong

Email authentication report card

What mailbox.org publishes in DNS to stop other people sending mail in its name, read record by record.

3 pass 2 weak

Can mail be forged as this domain?

No, a forgery is rejected

DMARC is set to p=reject and enforced on every message, so a receiver that honours it throws away any mail that fails alignment for this domain.

  • Weak

    SPF ~all

    The record ends in ~all. Mail from a host outside the list is only marked, not rejected, so it usually still arrives.

  • Pass

    DMARC p=reject

    Receivers are asked to reject any message that fails DMARC. This is the strongest published setting.

  • Weak

    MTA-STS testing

    A policy is published in testing mode. Failures are reported but delivery still goes ahead over an unverified connection.

  • Pass

    DNSSEC Signed

    The zone is signed, so the MX, SPF and DMARC answers above cannot be quietly rewritten in transit.

  • Pass

    TLS-RPT Published

    Sending servers have an address to report failed TLS deliveries to.

Why it scores 97?

  1. Registered more than five years ago.
  2. DMARC is published and enforced, so forged mail is rejected or quarantined.
  3. Accepts mail through 5 MX hosts.

What to publish to close the gaps

The records mailbox.org is missing, in the order they are worth doing. Owner names are written out in full, so they work whether your DNS panel wants a full name or a relative one.

  1. Tighten SPF to -all

    Namemailbox.org
    TypeTXT
    Valuev=spf1 <your existing mechanisms> -all

    Keep the mechanisms you already have and change the final qualifier. Anything softer leaves the forgery path open.

  2. Switch MTA-STS to enforce

    Valuemode: enforce

    Change mode in https://mta-sts.mailbox.org/.well-known/mta-sts.txt and bump the id in the TXT record. Testing mode reports failures but still delivers.

Questions about mailbox.org

Every answer below is generated from the stored record for this domain.

Is mailbox.org a disposable email domain?
No. mailbox.org is a consumer mailbox provider, so addresses are permanent, but anyone can open one in a minute.
Is mailbox.org spoofable?
No, a forgery is rejected. DMARC is set to p=reject and enforced on every message, so a receiver that honours it throws away any mail that fails alignment for this domain.
Does mailbox.org publish SPF and DMARC?
mailbox.org publishes an SPF record, though it does not end in -all, so hosts outside the list are not treated as forgeries. DMARC is published and enforced, so a failing message is rejected or quarantined.
Who handles email for mailbox.org?
We have not matched the mail hosts for mailbox.org to a platform we track, so we do not name one. The hostnames themselves are available with an API key.
How old is the mailbox.org domain?
The mailbox.org domain was registered 27 years ago. The registrar of record is CPS-Datensysteme GmbH.
How do I block mailbox.org on my signup form?
We do not classify mailbox.org as disposable, so blocking it outright would turn away real people. If you want to act on it, decide on the signals listed above rather than the name.
Can I trust email from mailbox.org?
mailbox.org scores 97 out of 100, which is a strong band. The score is a summary of the classification, infrastructure, authentication, reputation and lifecycle signals we hold, not a judgment about any individual sender at that domain.

Last verified . We recheck every domain on a schedule, and this report changes only when its records or its verdict do.