| MSN | |
|---|---|
| Domains | msn.com, passport.com |
| Mail routing | Microsoft's Outlook.com protection layer, shared with every other consumer domain in the family. |
| What we can resolve | We resolve some mailboxes here |
How MSN answers a probe
What the server does when we open a connection and ask about one address.
- Same responses and same throttling as every Microsoft consumer domain.
- The msn.com domain predates Hotmail's acquisition and carries the oldest accounts in Microsoft's consumer estate.
- Dormant accounts have been reclaimed over the years, so a local part can have changed hands more than once.
- Temporary failures under load are the usual obstacle rather than dishonest responses.
The part that catches people out
What we do about it
We verify MSN with the same Microsoft pacing and report the domain as the age signal it is. There is no separate technique here; the value is in naming the vintage so the list owner can judge the data source.
Sending to MSN mailboxes
Verification is one step. These are the things that decide whether the message lands.
- Microsoft's bulk sender expectations apply.
- Engagement from this domain is the lowest of the Microsoft consumer family in most lists.
- A high msn.com share is a strong indicator of recycled or purchased data.
webtv.net, passport.com and the rest of the attic
Microsoft's consumer mail carries more retired brands than most people remember. On September 19, 2026, msn.com returned msn-com.olc.protection.outlook.com. The old passport.com sign-in domain returned the outlook.com host. webtv.net, from the set-top box service Microsoft closed in 2013, returned nam.olc.protection.outlook.com. Those domains still route, which means rows on them still get a real SMTP answer.
Say a catalog retailer's 90,000-row house file includes 2,100 rows on msn.com and 160 on webtv.net. A reviewer who's never heard of WebTV may strike those 160 as fake. In fact they're the oldest customers in the file, people who've held one address through several eras of the internet, and if they still open your mail they may be among the most loyal names you have. Let the verifier and the click history decide.
Use engagement dates, not the domain, to set the rule
Old domains invite blanket rules like "drop all msn.com." A better rule uses two dates you already have: when the row entered your system, and its last click. A row that joined in 2004 and clicked last month is gold. One that appeared in a purchased file last year, on a domain almost nobody has chosen since the early 2000s, tells you that file was assembled from very old sources, and everything else in it deserves the same suspicion.
Microsoft also kept selling MSN dial-up and premium subscriptions long after most people forgot them, so some of these mailboxes have been attached to a monthly bill. You can't see that from a probe. It's one more reason a valid msn.com row with recent clicks should be left alone, and one with no activity since you acquired it should go through a re-permission step before it costs you a complaint.
Questions people ask
Are msn.com addresses still active?
Some are. They route into Outlook.com like every other Microsoft consumer domain. They are also the oldest addresses Microsoft still carries.
How verifiable is MSN?
Exactly as verifiable as Outlook.com, with the same throttling constraints. The domain changes nothing technically.
What does an msn.com address tell me about my data?
That it is old, or that it came from somewhere that recycled old data. The domain has not been a mainstream choice for around twenty years.