Domain Intelligence
Last Updated:

Cbp.gov

Proceed With Care

Cbp.gov is operated by U.S. Customs and Border Protection. The domain runs no MX records and SMTP is not currently responding, with 2 of 3 authentication standards in place.

Proceed With Care
Disposable
No
Persistent addresses, not throwaway
SMTP Live
No
Mail server not responding to SMTP
MX Records
0
Mail exchangers

Mail Exchange (MX) Records for cbp.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.

0 RECORDS
No MX records were found for this domain. The domain cannot receive mail.
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. No Response
Primary mail server did not respond to SMTP within the audit timeout. Mail to cbp.gov may bounce.

cbp.gov Email Authentication SPF · DKIM · DMARC

2/3 PASS
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 -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 cbp.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; pct=100; rua=mailto:DMARC@cbp.dhs.gov,mailto:reports@dmarc.cyber.dhs.gov
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.

cbp.gov Domain Registration WHOIS · Nameservers · Registrar

23 YEARS OLD
Registrarget.gov
IANA ID8888888
RegisteredApril 2, 2003
Last UpdatedSeptember 7, 2025
ExpiresSeptember 2, 2026
Age23 years
TLD.gov
Authoritative Nameservers (6)
  • a1-91.akam.net
  • a16-67.akam.net
  • a22-66.akam.net
  • a7-64.akam.net
  • a8-65.akam.net
  • a9-66.akam.net
Registrant
Hidden by registrar privacy service
Technical Contact
Hidden by registrar privacy service
About this Domain

About cbp.gov

The domain cbp.gov belongs to U.S. Customs and Border Protection (CBP), the largest federal law enforcement agency within the Department of Homeland Security. Headquartered in Washington, D.C., CBP is responsible for securing U.S. borders, facilitating lawful international trade and travel, and enforcing customs, immigration, and agricultural regulations.

As a federal .gov domain, cbp.gov complies with CISA Binding Operational Directive 18-01, mandating DMARC, SPF, and DKIM. Given CBP's role in border security and trade enforcement, phishing emails impersonating the agency could target importers, travelers, and businesses, making strict email authentication essential for protecting public trust.

CBP mail servers do not function as catch-all systems. The SMTP infrastructure rejects messages to nonexistent recipients at the connection level. As a DHS component agency, CBP employs aggressive rate limiting, greylisting, and multi-layered connection filtering to secure its email environment.

Delivering email to cbp.gov requires rigorous authentication compliance. DHS-managed email gateways apply the strictest content filtering, malware scanning, and sender verification. Senders must have fully compliant SPF, DKIM, and DMARC records and a strong IP reputation to achieve delivery to CBP addresses.

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Common Questions About cbp.gov

Is cbp.gov a disposable or temporary email provider?
No. cbp.gov is not a disposable email provider. It is classified as Government Email operated by U.S. Customs and Border Protection and addresses on cbp.gov are persistent rather than throwaway. Mail sent to a valid cbp.gov mailbox reaches a real recipient.
How do I verify if a cbp.gov email address is valid?
The fastest way to verify a cbp.gov email address is to use our free email checker. Enter any @cbp.gov mailbox at the top of this page and our system performs a real-time SMTP handshake against cbp.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 cbp.gov email exists without sending a message?
Yes. Our real-time email verification API connects directly to cbp.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 cbp.gov mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for cbp.gov?
cbp.gov has no MX records published, which means the domain cannot currently receive email. Any message sent to a cbp.gov address will hard-bounce at the sending server.
Does cbp.gov use SPF, DKIM, and DMARC email authentication?
cbp.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 cbp.gov mail.
Why do emails to cbp.gov bounce or get blocked?
Bounces from cbp.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 cbp.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 cbp.gov's receivers trust you.
How can I verify a large list of cbp.gov email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of cbp.gov addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, cbp.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 cbp.gov email addresses?
Yes, with normal hygiene. cbp.gov is a legitimate email service and signups from @cbp.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 cbp.gov by default.
What email format does cbp.gov use for usernames?
Most cbp.gov mailboxes follow common patterns like first.last@cbp.gov, firstinitiallast@cbp.gov, or first@cbp.gov, but the actual local-part rules depend on U.S. Customs and Border Protection. The only reliable way to confirm whether a specific @cbp.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 cbp.gov risk score calculated?
The 0-to-100 risk score for cbp.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 cbp.gov score is recomputed on every audit so it always reflects the live state of the domain.
Is cbp.gov a valid government email domain?
Yes, cbp.gov is a valid official government email domain operated by U.S. Customs and Border Protection. It is used by government employees and officials for official correspondence.
Is cbp.gov a disposable or temporary email provider?
No, cbp.gov is not a disposable or temporary email provider. It is an official government domain used for legitimate government communications and operations.
What mail server does cbp.gov use?
cbp.gov uses mail servers managed by U.S. Customs and Border Protection. Check the MX records section above for specific server details and authentication configuration.
Can I send emails to cbp.gov addresses?
Yes, cbp.gov addresses accept incoming email. Government mail servers typically enforce strict spam filtering, authentication checks (SPF, DKIM, DMARC), and content scanning. Ensure your sending domain is properly authenticated.
How do I verify an email address at cbp.gov?
Use BulkEmailChecker to verify cbp.gov addresses. Government domains may have specific SMTP behaviors including greylisting and strict rate limiting. Our tool handles these provider-specific configurations automatically.