gustr.com is a disposable email domain

gustr.com hands out throwaway mailboxes, so an address there identifies nobody.

Disposable Spoofable

0 /100

Poor

Email authentication report card

What gustr.com 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.

  • Pass

    SPF -all

    The record ends in -all, so a receiver is told to treat mail from any host outside the list as a forgery.

  • Pass

    DMARC p=reject

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

  • Weak

    MTA-STS Not published

    No MTA-STS policy, so a sending server has nothing that tells it to insist on verified TLS for this domain.

  • Pass

    DNSSEC Signed

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

  • Weak

    TLS-RPT Not published

    No reporting address, so failed TLS deliveries to this domain go unnoticed by its owner.

Why it scores 0?

  1. Mailboxes on this domain are throwaway, so no identity stands behind them.

What to publish to close the gaps

The records gustr.com 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. Publish an MTA-STS policy

    Name_mta-sts.gustr.com
    TypeTXT
    Valuev=STSv1; id=<a version string you bump on every change>

    Serve the policy body at https://mta-sts.gustr.com/.well-known/mta-sts.txt, start it in testing mode, then switch it to enforce so senders refuse to deliver over an unverified connection.

  2. Publish a TLS reporting address

    Name_smtp._tls.gustr.com
    TypeTXT
    Valuev=TLSRPTv1; rua=mailto:[email protected]

    Without it, a sending server that could not negotiate TLS with your mail hosts has nowhere to tell you.

Questions about gustr.com

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

Is gustr.com a disposable email domain?
Yes. gustr.com hands out throwaway mailboxes, so an address there tells you nothing about who is behind it.
Is gustr.com 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 gustr.com publish SPF and DMARC?
gustr.com publishes an SPF record that ends in -all, the strict form. DMARC is published and enforced, so a failing message is rejected or quarantined.
Who handles email for gustr.com?
Mail for gustr.com is handled by fakemailgenerator.com, which carries 6 other domains we track.
How old is the gustr.com domain?
The gustr.com domain was registered 18 years ago. The registrar of record is Cloudflare, Inc.
How do I block gustr.com on my signup form?
Blocking the exact string gustr.com is not enough on its own: a disposable provider adds domains, and some hand out unlimited subdomains under one name. Match the mail platform behind the domain rather than the domain alone, which is what the lookup behind this page does.
Can I trust email from gustr.com?
gustr.com scores 0 out of 100, which is a poor 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.