Domain Intelligence
Last Updated:
8x8 Email Verification
Safe to Send
8x8.com is operated by 8x8 Inc.. The domain runs 5 mail exchanges and SMTP is responsive, with all three authentication standards in force.
Safe to Send
RISK
10
/100
Low
Verify Mailbox
Verify @8x8.com emails
Live SMTP handshake against 8x8.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
Ran our entire 47k cold outbound list through this before our Q1 push. Bounce rate dropped from 9.4% to 0.8%. The SMTP-level catch on outdated B2B contacts is what set this apart from the other verifiers I tried. Andrew Mitchell · Sr. Demand Gen Manager
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 8x8.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.
#1
aspmx.l.google.com 142.251.163.27
Reachable
#5
alt1.aspmx.l.google.com 108.177.123.26
Reachable
#5
alt2.aspmx.l.google.com 172.253.116.27
Reachable
#10
alt3.aspmx.l.google.com 192.178.223.27
Reachable
#10
alt4.aspmx.l.google.com 173.194.76.26
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 d75a77b69052e-516456a4dd3si163265951cf.110 - gsmtp
Primary mail server accepted SMTP connection and returned a banner during the live audit.
8x8.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 exists:%{i}._spf.8x8.com exists:%{i}._spf.mta.salesforce.com include:_spf.google.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:b97dcacb8e@rua.easydmarc.eu,mailto:rua-reports@8x8.com;ruf=mailto:b97dcacb8e@ruf.easydmarc.eu,mailto:ruf-reports@8x8.com;fo=0:1:d:s;
Receivers are instructed to quarantine (route to spam) any mail that fails SPF or DKIM.
8x8.com Domain Registration WHOIS · Nameservers · Registrar
RegistrareasyDNS Technologies, Inc.
IANA ID469
RegisteredJanuary 22, 1996
Last UpdatedJanuary 17, 2025
ExpiresJanuary 23, 2034
Age30 years
TLD.com
Authoritative Nameservers (4)
- ns5.packet8.net
- ns6.packet8.net
- ns7.packet8.net
- ns8.packet8.net
Registrant
Raghu Rengarajan
8x8 Inc.
REDACTED FOR PRIVACY, REDACTED FOR PRIVACY, UNITED STATES
About this Domain
About 8x8.com
8x8 Inc. (8x8.com) is a cloud communications company headquartered in Campbell, California. 8x8 provides a unified communications platform combining voice, video, chat, contact center, and API solutions for businesses. The company serves over two million business users globally and is recognized as a leader in UCaaS and CCaaS platforms.
8x8 implements enterprise email authentication on the 8x8.com domain with SPF, DKIM, and DMARC enforcement. As a cloud communications provider handling sensitive business call data and contact center operations, 8x8 maintains strong email security to protect customer communications infrastructure and corporate correspondence.
SMTP verification of 8x8.com addresses returns definitive responses for valid and invalid mailboxes. The domain does not function as catch-all. 8x8's enterprise mail infrastructure implements rate limiting on inbound SMTP connections.
For partners communicating with 8x8 employees, proper sender authentication is essential. 8x8's corporate email filters enforce SPF, DKIM, and DMARC validation. Full authentication compliance ensures reliable inbox delivery to 8x8.com addresses.
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More Email Verification Tools
Free single-address checks, bulk uploads, and APIs for plugging email verification into your own product.
Common Questions About 8x8.com
Is 8x8.com a disposable or temporary email provider?
No. 8x8.com is not a disposable email provider. It is classified as Corporate Email operated by 8x8 Inc. and addresses on 8x8.com are persistent rather than throwaway. Mail sent to a valid 8x8.com mailbox reaches a real recipient.
How do I verify if a 8x8.com email address is valid?
The fastest way to verify a 8x8.com email address is to use our email checker. Enter any @8x8.com mailbox at the top of this page and our system performs a real-time SMTP handshake against 8x8.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 8x8.com email exists without sending a message?
Yes. Our real-time email verification API connects directly to 8x8.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 8x8.com mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for 8x8.com?
8x8.com 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 8x8.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 8x8.com.
Does 8x8.com use SPF, DKIM, and DMARC email authentication?
8x8.com 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 @8x8.com is genuine, and 8x8.com's DMARC policy of 'quarantine' instructs receivers how to handle messages that fail those checks.
Why do emails to 8x8.com bounce or get blocked?
Bounces from 8x8.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 8x8.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 8x8.com's receivers trust you.
How can I verify a large list of 8x8.com email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of 8x8.com addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, 8x8.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 8x8.com email addresses?
Yes, with normal hygiene. 8x8.com is a legitimate email service and signups from @8x8.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 8x8.com by default.
What email format does 8x8.com use for usernames?
Most 8x8.com mailboxes follow common patterns like first.last@8x8.com, firstinitiallast@8x8.com, or first@8x8.com, but the actual local-part rules depend on 8x8 Inc.. The only reliable way to confirm whether a specific @8x8.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 8x8.com risk score calculated?
The 0-to-100 risk score for 8x8.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 8x8.com score is recomputed on every audit so it always reflects the live state of the domain.
Is 8x8.com a valid corporate email domain?
Yes, 8x8.com is the official corporate email domain for 8x8 Inc.. It is used for internal business communications and is not available for public registration.
Is 8x8.com a disposable or temporary email provider?
No, 8x8.com is a corporate email domain belonging to 8x8 Inc., used exclusively by employees and authorized personnel.
What mail server does 8x8.com use?
8x8.com uses enterprise-grade mail infrastructure. Check the MX records section above for specific mail server details.
Can I send marketing emails to 8x8.com addresses?
B2B marketing to 8x8.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 8x8.com?
Corporate domains like 8x8.com may use catch-all configurations. Use BulkEmailChecker's advanced verification to detect catch-all behavior.