frontier.com is a free email provider

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

Free provider SpoofableISP mailbox

85 /100

Strong

Email authentication report card

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

5 weak

Can mail be forged as this domain?

Yes, a forgery is delivered

DMARC is set to p=none, which only asks for reports, so a receiver that honours what this domain publishes is not told to reject a message with it in the From header, and delivers it.

  • 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.

  • Weak

    DMARC p=none

    A DMARC record is published, but p=none only asks for reports. Receivers are told to deliver failing mail anyway, so this stops no forgery.

    A checker that reports "DMARC found" here is telling you nothing useful.

  • 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.

  • Weak

    DNSSEC Not signed

    The zone is not signed. A resolver has no cryptographic way to tell a real answer from a forged one.

  • Weak

    TLS-RPT Not published

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

Why it scores 85?

  1. Registered more than five years ago.
  2. Accepts mail through 3 MX hosts.
  3. Mail is handled by a mailbox provider we recognize.

What to publish to close the gaps

The records frontier.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. Tighten SPF to -all

    Namefrontier.com
    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. Move DMARC off p=none

    Name_dmarc.frontier.com
    TypeTXT
    Valuev=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]

    p=none blocks nothing. Once your reports show every legitimate sender passing, raise the policy to quarantine and then to reject.

  3. Publish an MTA-STS policy

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

    Serve the policy body at https://mta-sts.frontier.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.

  4. Publish a TLS reporting address

    Name_smtp._tls.frontier.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.

  5. Sign the zone with DNSSEC

    Turn DNSSEC on with your DNS provider, then publish the DS record it hands you at your registrar. Every record above is only as trustworthy as the answer that carries it, and signing the zone is what makes the answers verifiable.

Questions about frontier.com

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

Is frontier.com a disposable email domain?
No. frontier.com is a consumer mailbox provider, so addresses are permanent, but anyone can open one in a minute.
Is frontier.com spoofable?
Yes, a forgery is delivered. DMARC is set to p=none, which only asks for reports, so a receiver that honours what this domain publishes is not told to reject a message with it in the From header, and delivers it.
Does frontier.com publish SPF and DMARC?
frontier.com publishes an SPF record, though it does not end in -all, so hosts outside the list are not treated as forgeries. DMARC is published but set to p=none, which only asks for reports. It looks like protection and is not.
Who handles email for frontier.com?
Mail for frontier.com is handled by Yahoo Mail, which carries 87 other domains we track.
How old is the frontier.com domain?
The frontier.com domain was registered 34 years ago. The registrar of record is Register.com - Network Solutions, LLC.
How do I block frontier.com on my signup form?
We do not classify frontier.com 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 frontier.com?
frontier.com scores 85 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.