Mailbox provider · MSN
How to verify a msn.com email address
Can you verify an MSN address?
Partly, and not the mailbox right now. A checker can confirm the syntax, the mail servers and disposable or role patterns. Microsoft is currently refusing mailbox checks from our server's network, so SimpleVerifier doesn't probe @msn.com and returns every well-formed address as risky, never valid. Only a delivery, open or reply proves it.
Tuned for outlook.com, hotmail.com, live.com, msn.com. Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.
Paste your @msn.com addresses (a mixed list is fine) and check them together.
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MSN verification facts
| Primary mail server (MX) | msn-com.olc.protection.outlook.com (run by Microsoft) |
|---|---|
| Made-up address, 23 October 2026 | risky in both rounds, about 10.5 hours apart ("Provider hides mailbox status") |
| Mailbox probe | Not right now. Microsoft is refusing mailbox checks from our server's network, so the checker skips the probe. |
| Catch-all behaviour | Unknown, because we can't ask right now. Treated the same as unconfirmed. |
| Typical results | Risky ("Provider hides mailbox status") for well-formed addresses, never valid. Invalid only for bad syntax. |
| Always checked | Syntax, the domain's mail servers (MX), disposable domains, role inboxes (info@, sales@) and likely typos. |
| A list of addresses | Paste or drop it above: the first 100 checks are free with a Google sign-in, no card, results as a CSV. |
| Single-address tool | Outlook checker |
From our checker's code and our own dated measurements. Anything we cannot confirm is reported as risky, never valid. Last updated .
How do I check if a @msn.com address exists? You can check the syntax, mail servers and disposable or role patterns, but not the mailbox right now: Microsoft is refusing mailbox checks from our server's network, so SimpleVerifier doesn't probe @msn.com and returns it as risky ("Provider hides mailbox status"), never valid. The domain receives mail; only mail history (a clean delivery, an open or a reply) proves a @msn.com address is live.
Can you verify @msn.com addresses?
Not right nowNo, not right now. Microsoft is refusing mailbox checks from our server's network, so @msn.com isn't probed.
Outlook.com does reject unknown users during the SMTP conversation, but Microsoft currently refuses checks from our server's network before the mailbox question, so a probe would only get that refusal. The checker skips it and returns @msn.com addresses as risky with the reason "Provider hides mailbox status". It always checks the syntax, the domain's MX records, disposable domains and role addresses such as info@ first.
Provider hides mailbox statusWhat we can and cannot confirm at @msn.com
We can confirm
- The address is written correctly (syntax), and the domain publishes working mail servers (MX).
- Whether it is a disposable or role address (info@, sales@) or a likely typo of a bigger domain.
We cannot confirm
- Whether a single @msn.com mailbox exists. Microsoft is currently refusing checks from our server's network, so we don't probe MSN mailboxes and every @msn.com address comes back risky ("Provider hides mailbox status"), never valid.
- Which of those risky addresses will bounce. Use engagement history, or a small first batch.
- Whether a person reads the inbox, wants your email or agreed to receive it. No checker can see that.
Anything we cannot confirm comes back risky, never valid.
What we measured at msn.com
Measured by SimpleVerifier on 23 October 2026 through our production checker and public DNS. No message was sent and no real person's address was used.
| Made-up address, checked twice ~10.5 hours apart | risky both times ("Provider hides mailbox status") |
|---|---|
| Primary mail server (MX) | msn-com.olc.protection.outlook.com |
| Mail host | Microsoft |
| DMARC policy | p=none |
| SPF | published, ends ~all |
| MTA-STS | not published |
| DNSSEC | not signed |
Sources: How 51 mailbox providers answer verification checks, SPF, DMARC, MTA-STS and DNSSEC at 51 mailbox providers, both with CSVs (CC BY 4.0). All datasets: research.
Where your @msn.com addresses live
Already paying another verifier?
MSN addresses usually come back inconclusive from a mailbox check. On 12 October 2026 the msn.com mail server msn-com.olc.protection.outlook.com refused our checking server at the MAIL FROM stage, because part of the checking server's network is on Microsoft's block list. A refusal like that says nothing about whether the address exists.
Price: this tool is free. Checking a whole email list is from $9/mo, and the first 100 checks are free with Google, no card. See pricing
Live DNS snapshot: msn.com
Checked 6 November 2026, 11:12 UTCRead from DNS at the time shown and refreshed at most once a day. MX says where mail for msn.com goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
- 2
msn-com.olc.protection.outlook.comOutlook.com (Microsoft consumer)
First MX host belongs to Outlook.com (Microsoft consumer).
v=spf1 include:spf.protection.outlook.com include:spf-a.hotmail.com include:spf-b.hotmail.com include:spf-c.hotmail.com include:spf-d.hotmail.com include:_spf-ssg-a.microsoft.com ~allp=none: meets the requirement, but blocks nothing.
v=DMARC1; p=none; sp=quarantine; pct=100; rua=mailto:[email protected]; fo=1Look up any other domain with the MX lookup or the email provider lookup.
MSN at a glance
| Operated by | Microsoft; MSN is one of its consumer Outlook.com domainsSource: Microsoft: fix NDR 550 5.7.515 |
|---|---|
| Same mailbox system | live.com, msn.com, outlook.com and hotmail.com each have their own host under Microsoft's olc.protection.outlook.comObserved 12 October 2026 (dig MX) |
| MX hosts | msn-com.olc.protection.outlook.comObserved 12 October 2026 (dig MX) |
| Answer to a made-up address | Connection refused at MAIL FROM: 550 5.7.1 Unfortunately, messages from [IP] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140).Observed 12 October 2026 (SMTP probe of a made-up recipient, no message sent) |
| Inactive accounts | An Outlook.com mailbox not signed into within one year may be closed and its mail deletedSource: Microsoft: missing Outlook.com email |
| Inactive accounts | Accounts locked for more than two years are treated as inactive and closedSource: Microsoft account activity policy |
| Postmaster rules | Mail from high-volume sender domains must pass DMARC, with SPF or DKIM aligned to the From domainSource: Microsoft: fix NDR 550 5.7.515 |
What MSN's server says about a missing mailbox
MSN's server replied 550 5.7.1 Unfortunately, messages from [IP] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140).. That refusal happened at the MAIL FROM stage, before the checking server could name any recipient, so it is a verdict on the connecting server, not on the address. SimpleVerifier returns these as risky with "Mailbox check unavailable" and never as invalid, because treating a refusal as "mailbox not found" would delete real customers from your list.
Servers screen connections this way to keep spam out: missing reverse DNS, a low sending reputation or a blocklist listing are the usual triggers. The same screen applies to every checking service that connects from a shared or new IP, which is why msn.com results differ between verifiers. SMTP verification false positives explains how much to trust each answer.
Outlook.com does reject unknown users at RCPT TO, but while Microsoft refuses checks from our server's network a probe would only get this refusal, so SimpleVerifier skips it and returns these addresses as "Provider hides mailbox status". The Hotmail page covers that behaviour in detail.
msn.com: old addresses, Outlook.com rules
msn.com addresses are among Microsoft's oldest consumer mailboxes and today run on Outlook.com. Microsoft may close a mailbox after a year without a sign-in and closes accounts locked for over two years, so expect a share of msn.com addresses on long-held lists to be gone.
The domain sits under the same sender rules as Outlook.com and Hotmail: high-volume senders must pass SPF, DKIM and DMARC. Remove closed msn.com mailboxes before a send so they don't count against your sender reputation.
Cleaning msn.com addresses you can't check
Treat inconclusive msn.com results as unknown, not bad. The checks that don't need the mailbox still work: format, typo domains, duplicates and whether the domain can receive mail. The free list health check runs those in the browser.
For the rest, use the address's history. An address that signed up, bought or replied recently is very likely live. For old or bought data at msn.com, send a small batch first and suppress anything that hard-bounces. If the msn.com share of your list is small, it's often simpler to keep those rows out of a high-risk campaign than to guess.
Common questions
- How do I check if a @msn.com address exists?
- You can check the syntax, mail servers and disposable or role patterns, but not the mailbox right now: Microsoft is refusing mailbox checks from our server's network, so SimpleVerifier doesn't probe @msn.com and returns it as risky ("Provider hides mailbox status"), never valid. The domain receives mail; only mail history (a clean delivery, an open or a reply) proves a @msn.com address is live.
- Can I check a list of MSN addresses for free?
- Yes. Paste the list or drop a CSV on this page and sign in with Google: the first 100 addresses are checked free, no card, once per account, and the results download as a CSV. Single addresses can be checked on this page without an account, five a minute.
- Does checking an MSN address send them an email?
- No. For @msn.com the checker does not even contact the mailbox: it checks the syntax, mail servers and disposable or role patterns only. Nothing is sent and the owner is not notified.
- Why does my MSN address come back risky?
- Because Microsoft is refusing mailbox checks from our server's network right now, so the mailbox wasn't confirmed and the honest result is risky ("Provider hides mailbox status"). The domain receives mail. Risky means unconfirmed, not bad. Send to those addresses in a small first batch, or only where the address came from a sign-up you trust.
- Can I check if a msn.com address exists without emailing it?
- Usually not from a checking service. On 12 October 2026 MSN's server refused our checking connection at the MAIL FROM stage, before any mailbox question, so the result is inconclusive rather than valid or invalid.
- What mail servers does msn.com use?
- On 12 October 2026, msn.com published these MX hosts: msn-com.olc.protection.outlook.com. You can look them up yourself with the free MX lookup tool.
- Should I delete msn.com addresses that come back risky?
- No. For msn.com, risky reflects how the server treats checks, not the address. Remove the ones that fail format, typo-domain and duplicate checks, then send to the rest in a small batch and suppress whatever hard-bounces.
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