Domain Intelligence
Last Updated:
C3.ai
Safe to Send
C3.ai is operated by C3.ai Inc.. The domain runs 1 mail exchange and SMTP is responsive, with all three authentication standards in force.
Safe to Send
RISK
15
/100
Low
Verify Mailbox
Verify @c3.ai emails
Live SMTP handshake against c3.ai mail servers. No email is sent. 10 free per day, no signup.
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
1
Mail exchangers
Mail Exchange (MX) Records for c3.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.
#0
c3-ai.mail.protection.outlook.com 52.101.40.1
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 SJ5PEPF000001D0.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Mon, 11 May 2026 13:10:14 +0000 [08DEADE25CE73EF4]
Primary mail server accepted SMTP connection and returned a banner during the live audit.
c3.ai Email Authentication SPF · DKIM · DMARC
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.protection.outlook.com include:mail.zendesk.com include:mktomail.com include:spf.emailsignatures365.com include:sendgrid.net include:servers.mcsv.net include:email.formspro.microsoft.com include:amazonses.com include:_spf.psm.knowbe4.com -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.
Quarantine
TXTv=DMARC1;p=quarantine;rua=mailto:easy58535@easydmarc.com;ruf=mailto:ruf@rep.easydmarc.com;fo=1;pct=100;
Receivers are instructed to quarantine (route to spam) any mail that fails SPF or DKIM.
c3.ai Domain Registration WHOIS · Nameservers · Registrar
Registrarhttps://www.101domain.com/
IANA ID1011
RegisteredDecember 15, 2017
Last UpdatedFebruary 23, 2026
ExpiresNovember 14, 2026
Age8 years
TLD.ai
Authoritative Nameservers (4)
- NS-996.AWSDNS-60.NET
- NS-1771.AWSDNS-29.CO.UK
- NS-292.AWSDNS-36.COM
- NS-1038.AWSDNS-01.ORG
Registrant
Hidden by registrar privacy service
Technical Contact
Hidden by registrar privacy service
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Common Questions About c3.ai
Is c3.ai a disposable or temporary email provider?
No. c3.ai is not a disposable email provider. It is classified as Corporate Email operated by C3.ai Inc. and addresses on c3.ai are persistent rather than throwaway. Mail sent to a valid c3.ai mailbox reaches a real recipient.
How do I verify if a c3.ai email address is valid?
The fastest way to verify a c3.ai email address is to use our free email checker. Enter any @c3.ai mailbox at the top of this page and our system performs a real-time SMTP handshake against c3.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 c3.ai email exists without sending a message?
Yes. Our real-time email verification API connects directly to c3.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 c3.ai mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for c3.ai?
c3.ai currently publishes 1 mail exchange (MX) record. The primary MX is c3-ai.mail.protection.outlook.com, which is the first server contacted when other mail systems try to deliver email to a c3.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 c3.ai.
Does c3.ai use SPF, DKIM, and DMARC email authentication?
c3.ai enforces all three email authentication standards: SPF, DKIM, and DMARC (policy: quarantine). This is the gold-standard configuration. It means receivers can verify that mail claiming to come from @c3.ai is genuine, and c3.ai's DMARC policy of 'quarantine' instructs receivers how to handle messages that fail those checks.
Why do emails to c3.ai bounce or get blocked?
Bounces from c3.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 c3.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 c3.ai's receivers trust you.
How can I verify a large list of c3.ai email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of c3.ai addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, c3.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 c3.ai email addresses?
Yes, with normal hygiene. c3.ai is a legitimate email service and signups from @c3.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 c3.ai by default.
What email format does c3.ai use for usernames?
Most c3.ai mailboxes follow common patterns like first.last@c3.ai, firstinitiallast@c3.ai, or first@c3.ai, but the actual local-part rules depend on C3.ai Inc.. The only reliable way to confirm whether a specific @c3.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 c3.ai risk score calculated?
The 0-to-100 risk score for c3.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 c3.ai score is recomputed on every audit so it always reflects the live state of the domain.
Is c3.ai a valid corporate email domain?
Yes, c3.ai is the official corporate email domain for C3.ai Inc.. It is used for internal business communications and is not available for public registration.
Is c3.ai a disposable or temporary email provider?
No, c3.ai is a corporate email domain belonging to C3.ai Inc., used exclusively by employees and authorized personnel.
What mail server does c3.ai use?
c3.ai uses enterprise-grade mail infrastructure. Check the MX records section above for specific mail server details.
Can I send marketing emails to c3.ai addresses?
B2B marketing to c3.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 c3.ai?
Corporate domains like c3.ai may use catch-all configurations. Use BulkEmailChecker's advanced verification to detect catch-all behavior.