Mailbox provider · Hotmail
How to check if a Hotmail address still exists
Can you verify a Hotmail 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 @hotmail.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 @hotmail.com addresses (a mixed list is fine) and check them together.
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Hotmail verification facts
| Primary mail server (MX) | hotmail-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 @hotmail.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 @hotmail.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 @hotmail.com address is live.
Can you verify @hotmail.com addresses?
Not right nowNo, not right now. Microsoft is refusing mailbox checks from our server's network, so @hotmail.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 @hotmail.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 @hotmail.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 @hotmail.com mailbox exists. Microsoft is currently refusing checks from our server's network, so we don't probe Hotmail mailboxes and every @hotmail.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 hotmail.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) | hotmail-com.olc.protection.outlook.com |
| Mail host | Microsoft |
| DMARC policy | p=none |
| SPF | published, ends -all |
| MTA-STS | 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 @hotmail.com addresses live
Already paying another verifier?
Hotmail addresses are served by Microsoft's consumer Outlook.com system and behave the same way: Microsoft is currently refusing mailbox checks from our server's network, so our checker returns hotmail.com addresses as risky without probing them. The bigger issue is age. Microsoft closes mailboxes after a year without a sign-in, so many Hotmail addresses on older lists no longer exist.
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: hotmail.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 hotmail.com goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
- 2
hotmail-com.olc.protection.outlook.comOutlook.com (Microsoft consumer)
First MX host belongs to Outlook.com (Microsoft consumer).
v=spf1 include:spf2.outlook.com -allp=none: meets the requirement, but blocks nothing.
v=DMARC1; p=none; rua=mailto:[email protected];ruf=mailto:[email protected];fo=1:s:dLook up any other domain with the MX lookup or the email provider lookup.
Hotmail at a glance
| Operated by | Microsoft Corporation, as part of Outlook.comSource: Microsoft Services Agreement |
|---|---|
| Same mailbox system | outlook.com, hotmail.com, live.com and msn.com each point at their own olc.protection.outlook.com host; regional domains such as hotmail.co.uk and outlook.fr use eur.olc.protection.outlook.comObserved 7 October 2026 (dig MX) |
| MX hosts | hotmail-com.olc.protection.outlook.comObserved 7 October 2026 (dig MX) |
| Answer to a made-up address | Same consumer Outlook.com servers, not probed while Microsoft refuses checks from our server's network: a made-up address came back risky. Rejections of unknown users read 550 5.5.0 mailbox unavailableObserved 7 October 2026 (SimpleVerifier's live checker on a made-up recipient, no message sent) |
| Address rule | A Hotmail address can be an alias on a Microsoft account whose primary address is at outlook.com or live.com, delivering to the same inboxSource: Microsoft: email aliases in Outlook.com |
| Inactive accounts | Mailbox closed and email deleted after one year without a sign-inSource: Microsoft support: missing Outlook.com email |
| Bulk sender rules | Microsoft's high-volume rules name hotmail.com explicitly: SPF, DKIM and DMARC above 5,000 messages a daySource: Microsoft Defender for Office 365 blog |
Hotmail is Outlook.com under an older name
There is no separate Hotmail mail system to verify against. On 7 October 2026 hotmail.com resolved to hotmail-com.olc.protection.outlook.com, the same consumer platform as outlook.com, live.com and msn.com. National variants such as hotmail.co.uk, hotmail.fr and hotmail.de all pointed at eur.olc.protection.outlook.com. Treat every one of them as consumer Outlook.com when choosing how to read a result, and check unfamiliar ones with the MX lookup tool.
That also means one person may appear under several Microsoft domains. Outlook.com lets a single account hold more than one address, so [email protected] and [email protected] can be the same inbox, or two unrelated people. Unlike Gmail's dot rule, there is no published normalisation that collapses them, so do not merge Microsoft addresses on guesswork.
Why Hotmail addresses bounce on old lists
Hotmail addresses tend to be the oldest on any consumer list, and Microsoft's retention rule is short. Its support page says a mailbox that has not been signed in to at least once in a one-year period is closed and all email deleted. An address that was real when it subscribed in 2015 may have been closed for years.
Before mailing a Hotmail-heavy list that has sat untouched for twelve months, verify it, then send a small batch first. Any address that returns 550 5.5.0 on two checks a day or more apart should be suppressed. Do not mistake a 5.7.x rejection for a dead mailbox: it is Microsoft refusing the sending or checking server, and it says nothing about the address.
Sending to Hotmail after you clean the list
Removing dead addresses is half the job. Microsoft's high-volume sender requirements apply to hotmail.com recipients, and non-compliant mail is rejected with 550 5.7.515. The same announcement lists removing invalid addresses regularly as a best practice, which is the part verification handles. Microsoft's sender requirements walks through the authentication side.
Common questions
- How do I check if a @hotmail.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 @hotmail.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 @hotmail.com address is live.
- Can I check a list of Hotmail 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 a Hotmail address send them an email?
- No. For @hotmail.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 Hotmail 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.
- Is Hotmail still a separate email service?
- No. Hotmail addresses are served by Microsoft's consumer Outlook.com platform. On 7 October 2026 hotmail.com's MX record pointed at hotmail-com.olc.protection.outlook.com, the same infrastructure as outlook.com and live.com.
- Why do so many old Hotmail addresses bounce?
- Microsoft closes an Outlook.com mailbox, including Hotmail addresses, and deletes its email if nobody signs in at least once in a one-year period. Lists collected years ago contain many addresses that have since been closed.
- What does 550 5.5.0 mailbox unavailable mean for a Hotmail address?
- It is the reply Microsoft's consumer servers give when they will not accept mail for that recipient. Usually the mailbox no longer exists, but locked accounts can return it too, so re-check before deleting a large number.
- Should I treat hotmail.co.uk the same as hotmail.com?
- Yes. Regional Hotmail and Outlook domains such as hotmail.co.uk, hotmail.fr and outlook.fr route to eur.olc.protection.outlook.com, which is the same consumer Outlook.com platform with the same behaviour.
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