Domain Intelligence
Last Updated:
Linkedin.com
Safe to Send
Linkedin.com is operated by Microsoft Corporation. The domain runs 4 mail exchanges and SMTP is responsive, with all three authentication standards in force.
Safe to Send
RISK
5
/100
Low
Verify Mailbox
Verify @linkedin.com emails
Live SMTP handshake against linkedin.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
Reached out to support during our API integration last month. Response in under 15 minutes, the rep was so sharp and helpful that by the end of the thread it honestly felt like I was flirting with him. Amazing support team. A+++. Nathan Orozco · Lead Engineer · via X
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
4
Mail exchangers
Mail Exchange (MX) Records for linkedin.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.
#10
mail-a.linkedin.com 108.174.0.215
Reachable
#10
mail-d.linkedin.com 108.174.6.215
Reachable
#10
mail-c.linkedin.com 108.174.3.215
Reachable
#20
mail.linkedin.com 108.174.0.215
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 mail-a.linkedin.com ESMTP
Primary mail server accepted SMTP connection and returned a banner during the live audit.
linkedin.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 ip4:199.101.162.0/25 ip4:108.174.3.0/24 ip4:108.174.6.0/24 ip4:108.174.0.0/24 ip6:2620:109:c00d:104::/64 ip6:2620:109:c006:104::/64 ip6:2620:109:c003:104::/64 ip6:2620:119:50c0:207::/64 ip4:199.101.161.130 mx mx:docusign.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; rua=mailto:d@rua.agari.com,mailto:yfy3q-9359@rua.dmarc.emailanalyst.com; ruf=mailto:d@ruf.agari.com
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.
linkedin.com Domain Registration WHOIS · Nameservers · Registrar
RegistrarMarkmonitor Inc.
IANA ID292
RegisteredNovember 2, 2002
Last UpdatedOctober 1, 2025
ExpiresNovember 1, 2026
Age23 years
TLD.com
Authoritative Nameservers (8)
- dns1.p09.nsone.net
- dns2.p09.nsone.net
- dns3.p09.nsone.net
- dns4.p09.nsone.net
- ns1-42.azure-dns.com
- ns2-42.azure-dns.net
- ns3-42.azure-dns.org
- ns4-42.azure-dns.info
Registrant
Domain Administrator
LinkedIn Corporation
hostmaster@linkedin.com·Sunnyvale, CA, UNITED STATES·16506873600
Technical Contact
Domain Administrator
hostmaster@linkedin.com·16506873600
About this Domain
About linkedin.com
LinkedIn (linkedin.com) is the world's largest professional networking platform, owned by Microsoft Corporation and headquartered in Sunnyvale, California. LinkedIn serves over 1 billion members in more than 200 countries, connecting professionals for networking, job seeking, recruiting, and business development. The linkedin.com domain is used for corporate email by LinkedIn's employees.
The linkedin.com domain is protected by comprehensive email authentication including SPF, DKIM, and DMARC enforcement under Microsoft's security umbrella. LinkedIn is one of the most impersonated brands in business email phishing, with fraudulent messages disguised as connection requests, job opportunities, and InMail notifications. Strong domain authentication is critical for brand protection.
SMTP verification of linkedin.com addresses returns definitive responses for valid and invalid mailboxes. The domain does not operate as catch-all. LinkedIn's mail infrastructure, integrated with Microsoft's Exchange Online Protection, implements strict rate limiting and behavioral analysis on inbound SMTP connections.
For partners communicating with LinkedIn employees, proper authentication is essential. LinkedIn benefits from Microsoft's Defender for Office 365 protection, which applies sophisticated filtering including SPF/DKIM/DMARC validation, sender reputation analysis, and machine learning-based threat detection. Full authentication compliance is required for reliable inbox delivery.
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Common Questions About linkedin.com
Is linkedin.com a disposable or temporary email provider?
No. linkedin.com is not a disposable email provider. It is classified as Corporate Email operated by Microsoft Corporation and addresses on linkedin.com are persistent rather than throwaway. Mail sent to a valid linkedin.com mailbox reaches a real recipient.
How do I verify if a linkedin.com email address is valid?
The fastest way to verify a linkedin.com email address is to use our free email checker. Enter any @linkedin.com mailbox at the top of this page and our system performs a real-time SMTP handshake against linkedin.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 linkedin.com email exists without sending a message?
Yes. Our real-time email verification API connects directly to linkedin.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 linkedin.com mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for linkedin.com?
linkedin.com currently publishes 4 mail exchange (MX) records. The primary MX is mail-a.linkedin.com, which is the first server contacted when other mail systems try to deliver email to a linkedin.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 linkedin.com.
Does linkedin.com use SPF, DKIM, and DMARC email authentication?
linkedin.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 @linkedin.com is genuine, and linkedin.com's DMARC policy of 'reject' instructs receivers how to handle messages that fail those checks.
Why do emails to linkedin.com bounce or get blocked?
Bounces from linkedin.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 linkedin.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 linkedin.com's receivers trust you.
How can I verify a large list of linkedin.com email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of linkedin.com addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, linkedin.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 linkedin.com email addresses?
Yes, with normal hygiene. linkedin.com is a legitimate email service and signups from @linkedin.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 linkedin.com by default.
What email format does linkedin.com use for usernames?
Most linkedin.com mailboxes follow common patterns like first.last@linkedin.com, firstinitiallast@linkedin.com, or first@linkedin.com, but the actual local-part rules depend on Microsoft Corporation. The only reliable way to confirm whether a specific @linkedin.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 linkedin.com risk score calculated?
The 0-to-100 risk score for linkedin.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 linkedin.com score is recomputed on every audit so it always reflects the live state of the domain.
Is linkedin.com a valid email domain?
Yes, linkedin.com is the official corporate email domain for Microsoft Corporation. It is used for business communications and is not available for public registration.
Is linkedin.com a disposable or temporary email provider?
No, linkedin.com is a corporate email domain belonging to Microsoft Corporation, used exclusively by employees and authorized personnel.
What mail server does linkedin.com use?
linkedin.com uses enterprise-grade mail infrastructure. Check the MX records section above for specific mail server details.
Can I send marketing emails to linkedin.com addresses?
B2B marketing to linkedin.com addresses requires proper consent and compliance with anti-spam laws. Corporate domains may use catch-all configurations, so verify addresses before sending.
How do I verify an email address at linkedin.com?
Corporate domains like linkedin.com may use catch-all configurations. Use BulkEmailChecker advanced verification to detect catch-all behavior and validate individual addresses.