Domain Intelligence
Last Updated:

Cdc.gov

Safe to Send

Cdc.gov is operated by Centers for Disease Control. The domain runs 4 mail exchanges and SMTP is responsive, with all three authentication standards in force.

Safe to Send
Disposable
No
Persistent addresses, not throwaway
SMTP Live
Yes
Mail server responds to SMTP handshake
MX Records
4
Mail exchangers

Mail Exchange (MX) Records for cdc.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.

4 RECORDS
#10
primary.us.etp.fireeyegov.com 15.200.32.5
Reachable
#20
alt1.us.etp.fireeyegov.com 15.200.32.6
Reachable
#30
alt2.us.etp.fireeyegov.com 15.200.32.4
Reachable
#40
alt3.us.etp.fireeyegov.com 15.200.32.4
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 2.0.0 mx.us.email.fireeyegov.com ESMTP
Primary mail server accepted SMTP connection and returned a banner during the live audit.

cdc.gov Email Authentication SPF · DKIM · DMARC

3/3 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 ip4:51.5.72.0/24 ip4:172.81.81.38 ip4:51.4.72.0/24 ip4:51.5.80.0/27 ip4:51.4.80.0/27 ip4:172.81.81.50 ip4:172.81.82.50 ip4:63.123.152.4 ip4:40.92.0.0/15 ip4:172.81.82.79 ip4:172.81.80.64 ip4:172.81.81.39 ip4:172.81.82.87 ip4:172.81.82.88 ip4:155.95.96.50 ip4:155.95.86.50 ip4:23.90.98.102 ip4:124.17.27.36 ip4:149.72.0.0/16 ip4:198.21.0.0/21 ip4:50.31.32.0/19 ip4:167.89.0.0/17 ip4:68.232.140.57 ip4:68.232.140.79 include:_s0.cdc.gov -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. Pass
SELECTORDetected via standard selectors
A DKIM signature was detected. Outbound mail from this domain can be cryptographically verified.
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; fo=1; ri=3600; rua=mailto:8idhoybh@ag.us.dmarcian.com,mailto:reports@dmarc.cyber.dhs.gov; ruf=mailto:8idhoybh@fr.us.dmarcian.com;
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.

cdc.gov Domain Registration WHOIS · Nameservers · Registrar

28 YEARS OLD
Registrarget.gov
IANA ID93
RegisteredOctober 1, 1997
Last UpdatedSeptember 26, 2025
ExpiresAugust 21, 2026
Age28 years
TLD.gov
Authoritative Nameservers (6)
  • a1-43.akam.net
  • a2-64.akam.net
  • a28-65.akam.net
  • a5-66.akam.net
  • a8-67.akam.net
  • a9-64.akam.net
Registrant
Hidden by registrar privacy service
Technical Contact
Hidden by registrar privacy service
About this Domain

About cdc.gov

The domain cdc.gov belongs to the Centers for Disease Control and Prevention (CDC), the national public health agency of the United States. Headquartered in Atlanta, Georgia, the CDC is a division of the Department of Health and Human Services responsible for disease prevention, health promotion, emergency preparedness, and protecting public health nationwide.

As a federal .gov domain, cdc.gov is required to comply with CISA Binding Operational Directive 18-01, mandating DMARC, SPF, and DKIM implementation. The CDC is a frequent target of phishing campaigns, especially during public health emergencies, where fraudulent emails may impersonate the agency to spread misinformation or steal personal data.

CDC mail servers do not operate as catch-all systems. Recipient addresses are validated during the SMTP transaction, and messages to nonexistent mailboxes are rejected. The agency's email infrastructure employs greylisting, rate limiting, and strict sender validation to manage its high volume of inbound correspondence.

Reliable email delivery to cdc.gov demands full compliance with authentication protocols. The CDC's federal email gateways apply rigorous content filtering, attachment scanning, and sender reputation analysis. Maintaining correctly configured SPF, DKIM, and DMARC records, along with a positive sending reputation, is essential for reaching CDC inboxes.

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govt.nz
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Down 0 MX · 0/3 Auth
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Common Questions About cdc.gov

Is cdc.gov a disposable or temporary email provider?
No. cdc.gov is not a disposable email provider. It is classified as Government Email operated by Centers for Disease Control and addresses on cdc.gov are persistent rather than throwaway. Mail sent to a valid cdc.gov mailbox reaches a real recipient.
How do I verify if a cdc.gov email address is valid?
The fastest way to verify a cdc.gov email address is to use our free email checker. Enter any @cdc.gov mailbox at the top of this page and our system performs a real-time SMTP handshake against cdc.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 cdc.gov email exists without sending a message?
Yes. Our real-time email verification API connects directly to cdc.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 cdc.gov mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for cdc.gov?
cdc.gov currently publishes 4 mail exchange (MX) records. The primary MX is primary.us.etp.fireeyegov.com, which is the first server contacted when other mail systems try to deliver email to a cdc.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 cdc.gov.
Does cdc.gov use SPF, DKIM, and DMARC email authentication?
cdc.gov enforces all three email authentication standards: SPF, DKIM, and DMARC (policy: reject). This is the gold-standard configuration. It means receivers can verify that mail claiming to come from @cdc.gov is genuine, and cdc.gov's DMARC policy of 'reject' instructs receivers how to handle messages that fail those checks.
Why do emails to cdc.gov bounce or get blocked?
Bounces from cdc.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 cdc.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 cdc.gov's receivers trust you.
How can I verify a large list of cdc.gov email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of cdc.gov addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, cdc.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 cdc.gov email addresses?
Yes, with normal hygiene. cdc.gov is a legitimate email service and signups from @cdc.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 cdc.gov by default.
What email format does cdc.gov use for usernames?
Most cdc.gov mailboxes follow common patterns like first.last@cdc.gov, firstinitiallast@cdc.gov, or first@cdc.gov, but the actual local-part rules depend on Centers for Disease Control. The only reliable way to confirm whether a specific @cdc.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 cdc.gov risk score calculated?
The 0-to-100 risk score for cdc.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 cdc.gov score is recomputed on every audit so it always reflects the live state of the domain.
Is cdc.gov a valid email domain?
Yes, cdc.gov is an official government email domain used by Centers for Disease Control. Government domains are verified and regulated, making them highly trustworthy.
Is cdc.gov a disposable or temporary email provider?
No, cdc.gov is an official government domain used by Centers for Disease Control for official government communications.
What mail server does cdc.gov use?
cdc.gov uses government-managed mail infrastructure with strict security measures and email authentication.
Can I send marketing emails to cdc.gov addresses?
Sending unsolicited marketing emails to government addresses at cdc.gov is generally not recommended. Only send with explicit opt-in consent.
How do I verify an email address at cdc.gov?
Government domains like cdc.gov often have strict mail server configurations. Use BulkEmailChecker for reliable verification results.