Is defense.gov a valid email domain?
defense.gov has no MX record, so mail falls back to the domain's own address record. Most senders still deliver, but it is a fragile setup.
It is not a free provider and is not on our disposable list, so addresses here usually belong to a company, school or other organisation.
SPF is published and ends with -all. DMARC is set to reject.
Check an email address at defense.gov
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MX records
| Priority | Mail server | Resolves to |
|---|---|---|
| 0 | defense.gov | 184.31.70.235, 2600:141b:e800:219c::3a30 |
SPF
Record published
v=spf1 mx ip4:52.222.29.245/32 include:_spf.google.com -all
DMARC
Policy: reject
v=DMARC1; p=reject; rua=mailto:dmarc_reports@mail.mil,mailto:itservicedesk@defense.gov; fo=1
Disposable?
No, not on our disposable list.
Free provider?
No, not a known free provider.
What this means for your email list
What this means for addresses at this domain
The domain accepts mail, but whether a given person's mailbox exists depends on that organisation. Company domains often have staff who left, role mailboxes like info@ and sales@, and sometimes catch-all rules that accept everything. Verify the individual address before you send.
Sender authentication
defense.gov has a strict DMARC policy (reject): mail that fails authentication is refused, which protects its brand from spoofing and means anyone sending as defense.gov must have SPF and DKIM set up correctly.
✨ Report summary
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Sign up to get a report summary →Frequently asked questions
- Is defense.gov a valid email domain?
- Yes. defense.gov publishes an address record that mail falls back to and can receive email. Whether a particular mailbox exists is a separate question that only a mailbox check can answer.
- Is defense.gov a disposable email domain?
- No. defense.gov is not on our disposable list. The list is updated regularly, and new throwaway domains appear all the time.
- What are the MX records for defense.gov?
- defense.gov (priority 0).
- Does defense.gov have SPF and DMARC?
- SPF: yes, ending -all. DMARC: yes, policy reject.