Domain Intelligence
Last Updated:
Nsa.gov
Safe to Send
Nsa.gov is operated by National Security Agency. The domain runs 6 mail exchanges and SMTP is responsive, with 2 of 3 authentication standards in place.
Safe to Send
RISK
17
/100
Low
Disposable
No
Persistent addresses, not throwaway
SMTP Live
Yes
Mail server responds to SMTP handshake
MX Records
6
Mail exchangers
Mail Exchange (MX) Records for nsa.gov Mail Exchange records. They tell other mail servers which hosts are responsible for receiving email at this domain, in priority order. Lower priority numbers are tried first.
#10
pri-jeemsg.eemsg.mail.mil 156.112.250.15
Reachable
#20
sec-jeemsg.eemsg.mail.mil 156.112.250.10
Reachable
#30
emsm-gh1-uea10.ncsc.mil 214.29.60.2
Reachable
#30
w455-emsm-u11.ncsc.mil 214.80.121.18
Reachable
#30
emsm-gh1-uea11.ncsc.mil 214.29.60.3
Reachable
#30
w455-emsm-u10.ncsc.mil 214.80.121.17
Reachable
SMTP Handshake
Simple Mail Transfer Protocol. We open a live SMTP connection to the primary MX and read the greeting banner. A response confirms the mail server is alive and accepting connections.
Responsive
BANNER220 UHIL19PA13.eemsg.mail.mil ESMTP
Primary mail server accepted SMTP connection and returned a banner during the live audit.
nsa.gov Email Authentication SPF · DKIM · DMARC
SPF
Sender Policy Framework. A DNS record listing which servers are allowed to send mail for this domain. Receivers reject or flag mail from unauthorized servers.
Pass
TXTv=spf1 ip4:214.29.60.2/32 ip4:214.29.60.3/32 ip4:214.80.121.17/32 ip4:214.80.121.18/32 include:_spf.eemsg.mail.mil include:amazonses.com ~all
Authorized senders are defined and pass SPF policy.
DKIM
DomainKeys Identified Mail. The sending server cryptographically signs outbound mail with a private key, and receivers verify the signature using a public key in DNS.
Missing
No DKIM signature detected on common selectors for nsa.gov.
No DKIM signature was detected. Receivers cannot verify the integrity of outbound mail.
DMARC
Domain-based Message Authentication, Reporting & Conformance. Tells receivers what to do when SPF or DKIM checks fail: none, quarantine, or reject.
Reject
TXTv=DMARC1;p=reject;sp=reject;fo=1;rua=mailto:DMARC_REPORTING@nsa.gov,mailto:DMARC_reports@mail.mil;ruf=mailto:DMARC_REPORTING@nsa.gov,mailto:DMARC_reports@mail.mil;rf=afrf;pct=100
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.
nsa.gov Domain Registration WHOIS · Nameservers · Registrar
Registrarget.gov
IANA ID8888888
RegisteredOctober 1, 1997
Last UpdatedAugust 24, 2025
ExpiresAugust 19, 2026
Age28 years
TLD.gov
Authoritative Nameservers (6)
- a1-107.akam.net
- a11-66.akam.net
- a12-67.akam.net
- a2-64.akam.net
- a24-65.akam.net
- a5-66.akam.net
Registrant
Hidden by registrar privacy service
Technical Contact
Hidden by registrar privacy service
About this Domain
About nsa.gov
The National Security Agency (nsa.gov) is a U.S. intelligence agency within the Department of Defense responsible for signals intelligence (SIGINT), cybersecurity, and information assurance. The NSA is headquartered at Fort Meade, Maryland, and is one of the world's leading cryptologic organizations.
The NSA implements the strictest email authentication with SPF, DKIM, and DMARC enforcement. As the nation's top signals intelligence agency, NSA's email security is among the most rigorous in the federal government, facing constant nation-state targeting.
The nsa.gov mail servers do not operate as catch-all. Recipients are validated and invalid addresses rejected. NSA applies the strictest possible security filtering.
Email delivery to nsa.gov requires flawless authentication. NSA gateways apply the most rigorous filtering standards of any federal agency.
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More Email Verification Tools
Free single-address checks, bulk uploads, and APIs for plugging email verification into your own product.
Common Questions About nsa.gov
Is nsa.gov a disposable or temporary email provider?
No. nsa.gov is not a disposable email provider. It is classified as Government Email operated by National Security Agency and addresses on nsa.gov are persistent rather than throwaway. Mail sent to a valid nsa.gov mailbox reaches a real recipient.
How do I verify if a nsa.gov email address is valid?
The fastest way to verify a nsa.gov email address is to use our free email checker. Enter any @nsa.gov mailbox at the top of this page and our system performs a real-time SMTP handshake against nsa.gov's mail servers, confirming whether the mailbox exists, is reachable, and is safe to send to. No email is ever delivered during the check.
Can I check if a nsa.gov email exists without sending a message?
Yes. Our real-time email verification API connects directly to nsa.gov's mail server, opens an SMTP session, and queries the mailbox using the RCPT TO command without ever transmitting an actual email. The server's response confirms whether the nsa.gov mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for nsa.gov?
nsa.gov currently publishes 6 mail exchange (MX) records. The primary MX is pri-jeemsg.eemsg.mail.mil, which is the first server contacted when other mail systems try to deliver email to a nsa.gov address. The full list with priorities and IP addresses is in the MX Records panel above. MX records tell sending servers where to route email for nsa.gov.
Does nsa.gov use SPF, DKIM, and DMARC email authentication?
nsa.gov has 2 of the 3 standard email authentication records in place: SPF, and DMARC (policy: reject). Adding the missing layer(s) would tighten anti-spoofing protection and improve deliverability for legitimate nsa.gov mail.
Why do emails to nsa.gov bounce or get blocked?
Bounces from nsa.gov usually fall into three buckets: the mailbox doesn't exist (5xx user unknown), the inbox is full, or your sending domain isn't authenticated to nsa.gov's satisfaction. The fastest fix is to run each address through a free email verifier before you send, and to make sure your own SPF, DKIM, and DMARC are configured correctly so nsa.gov's receivers trust you.
How can I verify a large list of nsa.gov email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of nsa.gov addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, nsa.gov catch-all detection, role-account detection, and disposable-domain matching. Results typically come back within minutes and previously-failed addresses on your blacklist are reprocessed for free. For continuous high-volume needs, see our unlimited email verification API.
Is it safe to accept signups from nsa.gov email addresses?
Yes, with normal hygiene. nsa.gov is a legitimate email service and signups from @nsa.gov behave like any other real user. Pipe each address through a real-time email verifier API at the moment of signup to catch typos and dead mailboxes, but there is no need to block nsa.gov by default.
What email format does nsa.gov use for usernames?
Most nsa.gov mailboxes follow common patterns like first.last@nsa.gov, firstinitiallast@nsa.gov, or first@nsa.gov, but the actual local-part rules depend on National Security Agency. The only reliable way to confirm whether a specific @nsa.gov address exists is to run it through a free email verification tool. Guessing patterns will produce a high bounce rate and damage your sender reputation.
How is the nsa.gov risk score calculated?
The 0-to-100 risk score for nsa.gov combines disposable-domain classification, mail-server reachability, MX record presence and depth, SPF / DKIM / DMARC enforcement, DMARC policy strength, SMTP banner response, and domain age. Lower scores mean safer to send to. Disposable domains are pinned at the high end of the scale. The nsa.gov score is recomputed on every audit so it always reflects the live state of the domain.
Is nsa.gov a valid email domain?
Yes, nsa.gov is an official government email domain used by National Security Agency. Government domains are verified and regulated, making them highly trustworthy.
Is nsa.gov a disposable or temporary email provider?
No, nsa.gov is an official government domain used by National Security Agency for official government communications.
What mail server does nsa.gov use?
nsa.gov uses government-managed mail infrastructure with strict security measures and email authentication.
Can I send marketing emails to nsa.gov addresses?
Sending unsolicited marketing emails to government addresses at nsa.gov is generally not recommended. Only send with explicit opt-in consent.
How do I verify an email address at nsa.gov?
Government domains like nsa.gov often have strict mail server configurations. Use BulkEmailChecker for reliable verification results.