Domain Intelligence
Last Updated:

H2o.ai

Safe to Send

H2o.ai is operated by H2O.ai Inc.. The domain runs 5 mail exchanges and SMTP is responsive, with all three authentication standards in force.

Safe to Send
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Verify @h2o.ai emails

Live SMTP handshake against h2o.ai mail servers. No email is sent. 10 free per day, no signup.

@h2o.ai
No email sent No signup Real-time SMTP

Trusted by 400,000+ senders

4.9/5
From 8,500+ verified reviews
Switched after a billing dispute with NeverBounce. Same SMTP results on a 5k test sample. The MX, SPF, DKIM lookup tools are a hidden value-add for debugging client deliverability complaints. James Wexler · Growth Engineer
SOC 2 Type II GDPR CCPA 99.7% Accuracy
Disposable
No
Persistent addresses, not throwaway
SMTP Live
Yes
Mail server responds to SMTP handshake
MX Records
5
Mail exchangers

Mail Exchange (MX) Records for h2o.ai 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.

5 RECORDS
#1
aspmx.l.google.com 64.233.180.26
Reachable
#5
alt2.aspmx.l.google.com 172.253.116.26
Reachable
#5
alt1.aspmx.l.google.com 108.177.123.27
Reachable
#10
alt4.aspmx.l.google.com 173.194.76.27
Reachable
#10
alt3.aspmx.l.google.com 192.178.223.27
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 mx.google.com ESMTP af79cd13be357-907b87c3f64si1141236785a.130 - gsmtp
Primary mail server accepted SMTP connection and returned a banner during the live audit.

h2o.ai 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 include:_spf.google.com include:amazonses.com include:stspg-customer.com include:23974125.spf0.hubspotemail.net -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; ruf=mailto:dmarc@h2o.ai
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.

h2o.ai Domain Registration WHOIS · Nameservers · Registrar

8 YEARS OLD
RegistrarKey-Systems GmbH
IANA ID269
RegisteredDecember 15, 2017
Last UpdatedJanuary 12, 2026
ExpiresNovember 4, 2029
Age8 years
TLD.ai
Authoritative Nameservers (4)
  • ns-1325.awsdns-37.org
  • ns-990.awsdns-59.net
  • ns-1729.awsdns-24.co.uk
  • ns-477.awsdns-59.com
Registrant
Hidden by registrar privacy service
Technical Contact
Hidden by registrar privacy service

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Common Questions About h2o.ai

Is h2o.ai a disposable or temporary email provider?
No. h2o.ai is not a disposable email provider. It is classified as Corporate Email operated by H2O.ai Inc. and addresses on h2o.ai are persistent rather than throwaway. Mail sent to a valid h2o.ai mailbox reaches a real recipient.
How do I verify if a h2o.ai email address is valid?
The fastest way to verify a h2o.ai email address is to use our free email checker. Enter any @h2o.ai mailbox at the top of this page and our system performs a real-time SMTP handshake against h2o.ai'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 h2o.ai email exists without sending a message?
Yes. Our real-time email verification API connects directly to h2o.ai'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 h2o.ai mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for h2o.ai?
h2o.ai currently publishes 5 mail exchange (MX) records. The primary MX is aspmx.l.google.com, which is the first server contacted when other mail systems try to deliver email to a h2o.ai 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 h2o.ai.
Does h2o.ai use SPF, DKIM, and DMARC email authentication?
h2o.ai 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 @h2o.ai is genuine, and h2o.ai's DMARC policy of 'reject' instructs receivers how to handle messages that fail those checks.
Why do emails to h2o.ai bounce or get blocked?
Bounces from h2o.ai 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 h2o.ai'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 h2o.ai's receivers trust you.
How can I verify a large list of h2o.ai email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of h2o.ai addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, h2o.ai 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 h2o.ai email addresses?
Yes, with normal hygiene. h2o.ai is a legitimate email service and signups from @h2o.ai 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 h2o.ai by default.
What email format does h2o.ai use for usernames?
Most h2o.ai mailboxes follow common patterns like first.last@h2o.ai, firstinitiallast@h2o.ai, or first@h2o.ai, but the actual local-part rules depend on H2O.ai Inc.. The only reliable way to confirm whether a specific @h2o.ai 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 h2o.ai risk score calculated?
The 0-to-100 risk score for h2o.ai 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 h2o.ai score is recomputed on every audit so it always reflects the live state of the domain.
Is h2o.ai a valid corporate email domain?
Yes, h2o.ai is the official corporate email domain for H2O.ai Inc.. It is used for internal business communications and is not available for public registration.
Is h2o.ai a disposable or temporary email provider?
No, h2o.ai is a corporate email domain belonging to H2O.ai Inc., used exclusively by employees and authorized personnel.
What mail server does h2o.ai use?
h2o.ai uses enterprise-grade mail infrastructure. Check the MX records section above for specific mail server details.
Can I send marketing emails to h2o.ai addresses?
B2B marketing to h2o.ai requires proper consent. Corporate domains may use catch-all configurations, so verify individual addresses before sending.
How do I verify an email address at h2o.ai?
Corporate domains like h2o.ai may use catch-all configurations. Use BulkEmailChecker's advanced verification to detect catch-all behavior.