Domain Intelligence
Last Updated:
Confluent Email Verification
Safe to Send
Confluent.io is operated by Confluent Inc.. The domain runs 2 mail exchanges and SMTP is responsive, with all three authentication standards in force.
Safe to Send
RISK
10
/100
Low
Verify Mailbox
Verify @confluent.io emails
Live SMTP handshake against confluent.io 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
2
Mail exchangers
Mail Exchange (MX) Records for confluent.io 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
mx0a-001b2d07.pphosted.com 66.159.241.27
Reachable
#5
mx0b-001b2d07.pphosted.com 66.159.239.0
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 mx0a-001b2d07.pphosted.com ESMTP mfa-m0531174
Primary mail server accepted SMTP connection and returned a banner during the live audit.
confluent.io 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:%{ir}.%{v}.%{d}.spf.has.pphosted.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.
Reject
TXTv=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.
confluent.io Domain Registration WHOIS · Nameservers · Registrar
RegistrarMarkMonitor, Inc.
IANA ID292
RegisteredSeptember 22, 2014
Last UpdatedAugust 22, 2025
ExpiresSeptember 22, 2027
Age11 years
TLD.io
Authoritative Nameservers (4)
- ns-1085.awsdns-07.org
- ns-238.awsdns-29.com
- ns-1943.awsdns-50.co.uk
- ns-697.awsdns-23.net
Registrant
Confluent, Inc.
UNITED STATES
Technical Contact
Hidden by registrar privacy service
About this Domain
About confluent.io
Confluent Inc. (confluent.io) is a data streaming platform company headquartered in Mountain View, California. Founded by the creators of Apache Kafka, Confluent provides a cloud-native platform for data in motion, enabling enterprises to stream, connect, process, and govern real-time data across their organizations.
Confluent implements email authentication on the confluent.io domain with SPF, DKIM, and DMARC enforcement. As an enterprise data platform company, Confluent maintains strong email security to protect corporate communications and safeguard customer data integration environments.
SMTP verification of confluent.io addresses returns definitive responses for valid and invalid mailboxes. The domain does not function as catch-all. Confluent's mail infrastructure implements rate limiting on inbound SMTP connections.
For partners communicating with Confluent employees, proper sender authentication improves deliverability. Confluent's corporate email filters enforce SPF, DKIM, and DMARC validation. Authentication compliance ensures reliable inbox delivery to confluent.io addresses.
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Common Questions About confluent.io
Is confluent.io a disposable or temporary email provider?
No. confluent.io is not a disposable email provider. It is classified as Corporate Email operated by Confluent Inc. and addresses on confluent.io are persistent rather than throwaway. Mail sent to a valid confluent.io mailbox reaches a real recipient.
How do I verify if a confluent.io email address is valid?
The fastest way to verify a confluent.io email address is to use our email checker. Enter any @confluent.io mailbox at the top of this page and our system performs a real-time SMTP handshake against confluent.io'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 confluent.io email exists without sending a message?
Yes. Our real-time email verification API connects directly to confluent.io'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 confluent.io mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for confluent.io?
confluent.io currently publishes 2 mail exchange (MX) records. The primary MX is mx0a-001b2d07.pphosted.com, which is the first server contacted when other mail systems try to deliver email to a confluent.io 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 confluent.io.
Does confluent.io use SPF, DKIM, and DMARC email authentication?
confluent.io 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 @confluent.io is genuine, and confluent.io's DMARC policy of 'reject' instructs receivers how to handle messages that fail those checks.
Why do emails to confluent.io bounce or get blocked?
Bounces from confluent.io 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 confluent.io'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 confluent.io's receivers trust you.
How can I verify a large list of confluent.io email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of confluent.io addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, confluent.io 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 confluent.io email addresses?
Yes, with normal hygiene. confluent.io is a legitimate email service and signups from @confluent.io 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 confluent.io by default.
What email format does confluent.io use for usernames?
Most confluent.io mailboxes follow common patterns like first.last@confluent.io, firstinitiallast@confluent.io, or first@confluent.io, but the actual local-part rules depend on Confluent Inc.. The only reliable way to confirm whether a specific @confluent.io 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 confluent.io risk score calculated?
The 0-to-100 risk score for confluent.io 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 confluent.io score is recomputed on every audit so it always reflects the live state of the domain.
Is confluent.io a valid email domain?
Yes, confluent.io is the official corporate email domain for Confluent Inc.. It is used for internal business communications.
Is confluent.io a disposable or temporary email provider?
No, confluent.io is a corporate email domain belonging to Confluent Inc., used exclusively by employees and authorized personnel.
What mail server does confluent.io use?
confluent.io uses enterprise-grade mail infrastructure. Check the MX records section for specific mail server details.
Can I send marketing emails to confluent.io addresses?
B2B marketing to confluent.io requires proper consent. Corporate domains may use catch-all configurations, so verify individual addresses before sending.
How do I verify an email address at confluent.io?
Corporate domains like confluent.io may use catch-all configurations that accept all addresses. Use BulkEmailChecker advanced verification to detect catch-all behavior and validate individual mailboxes.