| Live.com | |
|---|---|
| Domains | live.com, live.co.uk, windowslive.com |
| Mail routing | The same Outlook.com protection layer that serves every Microsoft consumer domain. |
| What we can resolve | We resolve some mailboxes here |
How Live.com answers a probe
What the server does when we open a connection and ask about one address.
- Identical to Outlook.com, since it is the same infrastructure with a different domain.
- Throttling produces temporary failures on sustained probing, as everywhere in Microsoft's consumer estate.
- Country variants such as live.co.uk route the same way.
- Many live.com addresses date from the Windows Live years, roughly 2007 to 2012, which places them between Hotmail and Outlook.com vintages. The domain alone doesn't date an address.
The part that catches people out
What we do about it
We report live.com results exactly as Outlook.com results, because the infrastructure is identical. We do not attempt to infer whether an address is a sign-in identity rather than a used mailbox, since nothing in the SMTP response says so.
Sending to Live.com mailboxes
Verification is one step. These are the things that decide whether the message lands.
- Microsoft's sender requirements apply to this domain family.
- Sign-in identity addresses are a real engagement problem that no verification pass can detect.
- Segment Microsoft consumer domains by vintage if you care about engagement more than validity.
The subscriber who renamed their account
Microsoft lets people add a new alias to an account, make it the primary address, and remove the old one. Plenty of live.com users did exactly that when outlook.com arrived and the old name started to look dated. Say dana_k@live.com subscribed to you in 2011. In 2016 Dana added dana.k@outlook.com, switched to it, and deleted the live.com alias. Your probe now gets a rejection, and the verdict is correct: the address is gone.
Dana is still a customer, with the same inbox under a new name, and nothing in the SMTP reply connects the two. If a once-active live.com subscriber turns invalid, that's a good candidate for a win-back through another channel you have permission to use, such as an account notice at next login or a line on a receipt asking them to update their email.
A removed Microsoft alias doesn't come back
Microsoft's support pages say that when you remove an alias on one of its own domains, live.com included, it's deleted permanently and can't be attached to any account again. That's useful to know when you decide how long to keep a suppressed row. A live.com address that was rejected because its owner removed it won't return to life later, under them or under a stranger.
You can't tell from outside why a rejection happened, so don't build an elaborate rule on it. The practical version is simple: an invalid verdict on live.com can go to permanent suppression, with no need to re-check it every quarter. While you're in the DNS, note that the family is split by region. On September 19, 2026, live.com returned live-com.olc.protection.outlook.com, live.co.uk returned eur.olc.protection.outlook.com, and windowslive.com returned nam.olc.protection.outlook.com. Group them by those hosts if you pace your own sends to Microsoft.
Questions people ask
What is a live.com address?
A Microsoft consumer mailbox on a domain from the Windows Live era, roughly 2007 to 2012. It routes into Outlook.com today.
Why do live.com addresses never open anything?
Many were created as Microsoft account sign-ins for Xbox or Windows rather than as mailboxes. The address exists and works, and nobody treats it as their email.
Can you tell a sign-in address from a real mailbox?
No, and neither can anyone else. They are identical at the protocol level. Engagement data is the only signal.