Domain Intelligence
Last Updated:
Hbo Email Verification
Safe to Send
Hbo.com is operated by Warner Bros. Discovery. The domain runs 1 mail exchange and SMTP is responsive, with all three authentication standards in force.
Safe to Send
RISK
10
/100
Low
Verify Mailbox
Verify @hbo.com emails
Live SMTP handshake against hbo.com 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
Disposable detection is the strongest I've tested. We were drowning in fake signups before integration. Fraudulent account creation dropped roughly 80% in the first 10 days. Risk score on the lookup pages helps our analysts triage faster too. Elena Reyes · Trust & Safety, Fintech
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 hbo.com 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
hbo-com.mail.protection.outlook.com 52.101.41.24
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 SJ5PEPF000001EE.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Sun, 17 May 2026 19:10:24 +0000 [08DEB32E4989D947]
Primary mail server accepted SMTP connection and returned a banner during the live audit.
hbo.com 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:hbo.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~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; rua=mailto:dmarc_agg@vali.email,mailto:dmarc@hbo.com; ruf=mailto:MTI3@ruf.vali.email,mailto:dmarc@hbo.com
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.
hbo.com Domain Registration WHOIS · Nameservers · Registrar
RegistrarMarkMonitor, Inc.
IANA ID292
RegisteredSeptember 20, 1995
Last UpdatedAugust 18, 2024
ExpiresSeptember 18, 2026
Age30 years
TLD.com
Authoritative Nameservers (4)
- ns-63.awsdns-07.com
- ns-1897.awsdns-45.co.uk
- ns-1217.awsdns-24.org
- ns-662.awsdns-18.net
Registrant
Home Box Office, Inc.
UNITED STATES
Technical Contact
Hidden by registrar privacy service
About this Domain
About hbo.com
HBO (hbo.com), part of Warner Bros. Discovery, is a premium cable and streaming television network headquartered in New York City. HBO is known for producing critically acclaimed original series including Game of Thrones, Succession, The Last of Us, and The Wire. The Max streaming platform serves as the digital home for HBO content alongside Warner Bros. titles.
HBO implements email authentication on the hbo.com domain with SPF, DKIM, and DMARC enforcement. As a premium entertainment brand, HBO faces phishing threats from campaigns impersonating subscription offers, password reset requests, and content access notifications.
Email verification against hbo.com returns definitive responses for valid and invalid mailboxes. The domain does not operate as catch-all. HBO's mail infrastructure, under Warner Bros. Discovery's corporate umbrella, implements rate limiting on inbound SMTP connections.
For partners communicating with HBO employees, proper sender authentication is important. HBO's corporate email filters enforce SPF, DKIM, and DMARC validation. Full authentication compliance ensures reliable inbox delivery to hbo.com addresses.
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More Email Verification Tools
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Common Questions About hbo.com
Is hbo.com a disposable or temporary email provider?
No. hbo.com is not a disposable email provider. It is classified as Corporate Email operated by Warner Bros. Discovery and addresses on hbo.com are persistent rather than throwaway. Mail sent to a valid hbo.com mailbox reaches a real recipient.
How do I verify if a hbo.com email address is valid?
The fastest way to verify a hbo.com email address is to use our email checker. Enter any @hbo.com mailbox at the top of this page and our system performs a real-time SMTP handshake against hbo.com'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 hbo.com email exists without sending a message?
Yes. Our real-time email verification API connects directly to hbo.com'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 hbo.com mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for hbo.com?
hbo.com currently publishes 1 mail exchange (MX) record. The primary MX is hbo-com.mail.protection.outlook.com, which is the first server contacted when other mail systems try to deliver email to a hbo.com 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 hbo.com.
Does hbo.com use SPF, DKIM, and DMARC email authentication?
hbo.com 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 @hbo.com is genuine, and hbo.com's DMARC policy of 'reject' instructs receivers how to handle messages that fail those checks.
Why do emails to hbo.com bounce or get blocked?
Bounces from hbo.com 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 hbo.com'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 hbo.com's receivers trust you.
How can I verify a large list of hbo.com email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of hbo.com addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, hbo.com 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 hbo.com email addresses?
Yes, with normal hygiene. hbo.com is a legitimate email service and signups from @hbo.com 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 hbo.com by default.
What email format does hbo.com use for usernames?
Most hbo.com mailboxes follow common patterns like first.last@hbo.com, firstinitiallast@hbo.com, or first@hbo.com, but the actual local-part rules depend on Warner Bros. Discovery. The only reliable way to confirm whether a specific @hbo.com 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 hbo.com risk score calculated?
The 0-to-100 risk score for hbo.com 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 hbo.com score is recomputed on every audit so it always reflects the live state of the domain.
Is hbo.com a valid email domain?
Yes, hbo.com is the official corporate email domain for Warner Bros. Discovery. It is used for internal business communications.
Is hbo.com a disposable or temporary email provider?
No, hbo.com is a corporate email domain belonging to Warner Bros. Discovery, used exclusively by employees and authorized personnel.
What mail server does hbo.com use?
hbo.com uses enterprise-grade mail infrastructure. Check the MX records section for specific mail server details.
Can I send marketing emails to hbo.com addresses?
B2B marketing to hbo.com requires proper consent. Corporate domains may use catch-all configurations, so verify individual addresses before sending.
How do I verify an email address at hbo.com?
Corporate domains like hbo.com may use catch-all configurations that accept all addresses. Use BulkEmailChecker advanced verification to detect catch-all behavior and validate individual mailboxes.