Yes. You can verify any @Nih.gov address in real time with a direct SMTP handshake that provides 99.7% accuracy. Nih.gov is operated by National Institutes of Health, runs 8 mail servers, enforces 3 of 3 authentication standards, and is currently responding to SMTP.
Every check returns one of three clear outcomes so you know exactly what to do with the address.
The mailbox exists and accepts mail. Send with confidence, the address is deliverable.
The mailbox does not exist, is disposable, or will hard-bounce. Remove it to protect your sender reputation.
The server is catch-all or greylisting, so existence cannot be confirmed. Send selectively and watch engagement.
nih.gov publishes 8 MX records. The primary mail exchanger is nihcesxwayst04.hub.nih.gov, hosted by nih.gov, and it is currently reachable and answering SMTP. Mail is routed through these servers in priority order, lowest number first.
| Priority | Hostname | IP | Status |
|---|---|---|---|
| 10 | nihcesxwayst04.hub.nih.gov | 165.112.13.42 | Reachable |
| 10 | nihcesxway6.hub.nih.gov | 128.231.90.121 | Reachable |
| 10 | nihcesxway3.hub.nih.gov | 128.231.90.125 | Reachable |
| 10 | nihcesxwayst06.hub.nih.gov | 165.112.13.54 | Reachable |
| 10 | nihcesxway4.hub.nih.gov | 128.231.90.119 | Reachable |
| 10 | nihcesxwayst03.hub.nih.gov | 165.112.13.34 | Reachable |
| 10 | nihcesxway5.hub.nih.gov | 128.231.90.120 | Reachable |
| 10 | nihcesxwayst05.hub.nih.gov | 165.112.13.46 | Reachable |
220 nihcesxwayst04.hub.nih.gov ESMTPYes. nih.gov is a valid email domain, operated by National Institutes of Health. Addresses are persistent and real mail reaches a genuine recipient. Individual mailboxes still go stale, so verify each one before you send.
A live SMTP handshake connects to Nih.gov's mail server and asks whether the mailbox exists using the RCPT TO command, without ever transmitting a message. The recipient never sees the check.
Each address runs through 30+ checks including SMTP existence, catch-all detection, role-account filtering, and disposable matching. The same engine has verified billions of addresses since 2012.
Every unverified address is a gamble. Here is what happens when you skip verification and mail a list that has not been cleaned.
People leave companies. Verification flags nih.gov mailboxes deactivated since you collected them.
Expired or full nih.gov inboxes hard-bounce. A live SMTP check catches them before you hit send.
Low bounce rates keep you trusted by nih.gov mail servers and the major mailbox providers.
Verified contacts mean your CRM, lead scoring, and routing all run on addresses that reach a person.
Nih.gov is National Institutes of Health, registered through get.gov and first seen Oct 1, 1997.
The National Institutes of Health (nih.gov) is the primary U.S. federal agency for biomedical and public health research. Part of HHS, NIH comprises 27 institutes and centers, funds medical research worldwide, and conducts groundbreaking studies at its campus in Bethesda, Maryland.
NIH implements mandatory DMARC enforcement per CISA BOD 18-01 with SPF, DKIM, and DMARC. As a leading health research institution, NIH faces phishing targeting researchers and grant applicants. Email security protects sensitive research communications.
The nih.gov mail servers do not function as catch-all. Recipients are validated and invalid addresses rejected. NIH applies strict security filtering.
Email delivery to nih.gov requires full authentication compliance. NIH gateways apply rigorous filtering given the sensitivity of health research communications.
Upload a CSV or TXT list of Nih.gov addresses to the bulk email verifier. Every address runs through a live SMTP handshake plus catch-all, role-account and disposable detection, and you download a clean list when processing completes. For real-time checks at signup, use the real-time email verification API.
CSV or TXT with one email per line. No formatting needed.
Each Nih.gov address is checked with a live server handshake.
Get a verified list with status codes, risk flags, and catch-all detection.
Pay as you go. No subscriptions, and credits never expire.
Everything about verifying email at this domain.
Yes, nih.gov is an official government email domain used by National Institutes of Health. Government domains are verified and regulated, making them highly trustworthy.
No, nih.gov is an official government domain used by National Institutes of Health for official government communications.
nih.gov uses government-managed mail infrastructure with strict security measures and email authentication.
Sending unsolicited marketing emails to government addresses at nih.gov is generally not recommended. Only send with explicit opt-in consent.
Government domains like nih.gov often have strict mail server configurations. Use BulkEmailChecker for reliable verification results.
Upload a CSV or TXT list to the bulk email verifier. Every address runs through 30+ checks including SMTP existence, catch-all detection, role-account, and disposable matching. Processing time depends on list size.
99.7% accurate using a direct SMTP handshake with nih.gov's mail servers, the same engine that has verified billions of addresses since 2012.
Other government email domains we have audited.