Domain Intelligence
Last Updated:
Outlook.de
Safe to Send
Outlook.de is operated by Microsoft Corporation. The domain runs 1 mail exchange and SMTP is responsive, with 1 of 3 authentication standards in place.
Safe to Send
RISK
1
/100
Low
Verify Mailbox
Verify @outlook.de emails
Live SMTP handshake against outlook.de 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
We had a sender reputation crisis after a list import went badly. Used the bulk verifier to scrub everything, then plugged the API into our signup form. Took deliverability from 73% to 96% over six weeks. Sarah Knowles · Email Marketing Lead
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 outlook.de 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
eur.olc.protection.outlook.com 52.101.68.24
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 DB1PEPF000509EB.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Sat, 9 May 2026 11:10:12 +0000 [08DEADA62A3301D6]
Primary mail server accepted SMTP connection and returned a banner during the live audit.
outlook.de 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-a.hotmail.com include:spf-b.hotmail.com include:spf-c.hotmail.com include:spf-d.hotmail.com include:spf.protection.outlook.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.
Missing
No DKIM signature detected on common selectors for outlook.de.
No DKIM signature was detected. Receivers cannot verify the integrity of outbound mail.
DMARC
Domain-based Message Authentication, Reporting & Conformance. Tells receivers what to do when SPF or DKIM checks fail: none, quarantine, or reject.
Missing
No DMARC record published at _dmarc.outlook.de.
No DMARC policy is published. Receivers have no instruction for handling failed messages from this domain.
outlook.de Domain Registration WHOIS · Nameservers · Registrar
Last UpdatedMarch 7, 2025
TLD.de
Authoritative Nameservers (4)
- ns1-38.azure-dns.com
- ns2-38.azure-dns.net
- ns3-38.azure-dns.org
- ns4-38.azure-dns.info
About this Domain
About outlook.de
outlook.de is the German variant of Microsoft's Outlook.com. This domain serves German users with localized Outlook email under EU and German privacy compliance. All accounts operate through Microsoft's Exchange Online infrastructure.
outlook.de shares Microsoft's comprehensive authentication with SPF, DKIM, and DMARC. The service complies with German Bundesdatenschutzgesetz and EU GDPR.
The outlook.de mail servers enforce recipient verification and reject invalid addresses. The domain does not operate as catch-all.
Delivering to outlook.de follows Microsoft's standards. Authenticate fully. Comply with German UWG anti-spam rules for commercial messages.
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Common Questions About outlook.de
Is outlook.de a disposable or temporary email provider?
No. outlook.de is not a disposable email provider. It is classified as Free Email Provider operated by Microsoft Corporation and addresses on outlook.de are persistent rather than throwaway. Mail sent to a valid outlook.de mailbox reaches a real recipient.
How do I verify if a outlook.de email address is valid?
The fastest way to verify a outlook.de email address is to use our free email checker. Enter any @outlook.de mailbox at the top of this page and our system performs a real-time SMTP handshake against outlook.de'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 outlook.de email exists without sending a message?
Yes. Our real-time email verification API connects directly to outlook.de'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 outlook.de mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for outlook.de?
outlook.de currently publishes 1 mail exchange (MX) record. The primary MX is eur.olc.protection.outlook.com, which is the first server contacted when other mail systems try to deliver email to a outlook.de 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 outlook.de.
Does outlook.de use SPF, DKIM, and DMARC email authentication?
outlook.de has 1 of the 3 standard email authentication records in place: SPF and . Adding the missing layer(s) would tighten anti-spoofing protection and improve deliverability for legitimate outlook.de mail.
Why do emails to outlook.de bounce or get blocked?
Bounces from outlook.de 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 outlook.de'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 outlook.de's receivers trust you.
How can I verify a large list of outlook.de email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of outlook.de addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, outlook.de 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 outlook.de email addresses?
Yes, with normal hygiene. outlook.de is a legitimate email service and signups from @outlook.de 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 outlook.de by default.
What email format does outlook.de use for usernames?
Most outlook.de mailboxes follow common patterns like first.last@outlook.de, firstinitiallast@outlook.de, or first@outlook.de, but the actual local-part rules depend on Microsoft Corporation. The only reliable way to confirm whether a specific @outlook.de 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 outlook.de risk score calculated?
The 0-to-100 risk score for outlook.de 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 outlook.de score is recomputed on every audit so it always reflects the live state of the domain.
Is outlook.de a valid email domain?
Yes, outlook.de is a valid free email domain operated by Microsoft Corporation. It provides permanent email accounts to users.
Is outlook.de a disposable or temporary email provider?
No, outlook.de is not a disposable or temporary email provider. It offers permanent email accounts with standard email features.
What mail server does outlook.de use?
outlook.de uses mail servers operated by Microsoft Corporation. Check the MX records section above for specific server details.
Can I send marketing emails to outlook.de addresses?
Yes, with proper opt-in consent. Follow email best practices and ensure SPF, DKIM, and DMARC authentication is configured for your sending domain.
How do I verify an email address at outlook.de?
Use BulkEmailChecker to verify outlook.de addresses via SMTP checks. Verification behavior varies by provider. Our tool handles provider-specific rate limiting automatically.