Yes. You can verify any @Gao.gov address in real time with a direct SMTP handshake that provides 99.7% accuracy. Gao.gov is operated by Government Accountability Office, runs 2 mail servers, enforces 2 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.
gao.gov publishes 2 MX records. The primary mail exchanger is mxa-0030d401.gslb.pphosted.com, hosted by Proofpoint, 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 | mxa-0030d401.gslb.pphosted.com | 148.163.146.188 | Reachable |
| 10 | mxb-0030d401.gslb.pphosted.com | 148.163.142.160 | Reachable |
220 mx0a-0030d401.pphosted.com ESMTP mfa-m0148965Yes. gao.gov is a valid email domain, operated by Government Accountability Office. 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 Gao.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 gao.gov mailboxes deactivated since you collected them.
Expired or full gao.gov inboxes hard-bounce. A live SMTP check catches them before you hit send.
Low bounce rates keep you trusted by gao.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.
Gao.gov is Government Accountability Office, registered through get.gov and first seen Oct 1, 1997.
The domain gao.gov belongs to the U.S. Government Accountability Office (GAO), an independent, nonpartisan legislative branch agency that serves as the audit, evaluation, and investigative arm of Congress. Based in Washington, D.C., the GAO examines how taxpayer dollars are spent and provides Congress with objective analysis to improve government performance and accountability.
As a federal .gov domain, gao.gov is subject to CISA Binding Operational Directive 18-01, requiring DMARC, SPF, and DKIM implementation. Email authentication protects GAO communications from spoofing, as fraudulent messages could be used to distribute false audit findings or impersonate GAO investigators conducting oversight reviews.
GAO mail servers do not function as catch-all systems. The SMTP infrastructure validates recipient addresses and rejects messages to nonexistent mailboxes. As a legislative branch agency, GAO email servers employ greylisting, rate limiting, and connection filtering to manage inbound traffic.
Successful email delivery to gao.gov requires strict adherence to authentication standards. Federal email gateways apply thorough content filtering, attachment scanning, and reputation-based sender evaluation. Senders must maintain correctly configured SPF, DKIM, and DMARC records for reliable delivery to GAO addresses.
Upload a CSV or TXT list of Gao.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 Gao.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, gao.gov is a valid official government email domain operated by Government Accountability Office. It is used by government employees and officials for official correspondence.
No, gao.gov is not a disposable or temporary email provider. It is an official government domain used for legitimate government communications and operations.
gao.gov uses mail servers managed by Government Accountability Office. Check the MX records section above for specific server details and authentication configuration.
Yes, gao.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.
Use BulkEmailChecker to verify gao.gov addresses. Government domains may have specific SMTP behaviors including greylisting and strict rate limiting. Our tool handles these provider-specific configurations automatically.
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 gao.gov's mail servers, the same engine that has verified billions of addresses since 2012.
Other government email domains we have audited.