Microsoft SmartScreen and Exchange Online Protection (EOP) penalize senders after just a few hard bounces. Verify @outlook.com, @hotmail.com, @live.com and Office 365 domains in real time.
outlook.com, hotmail.com, live.com, msn.com & Microsoft 365
·
Primary MX: *.mail.protection.outlook.com
Hotmail and Outlook use Smart Network Data Services (SNDS) to block IPs that hit dead mailboxes or recycled spam traps. Removing invalid @hotmail.com addresses is the #1 way to stay out of the Outlook Junk folder.
Enterprise domains using *.mail.protection.outlook.com often enable anti-enumeration or catch-all rules. Our engine detects EOP gateways and scores catch-all risk accurately.
Full support for @hotmail.co.uk, @hotmail.fr, @hotmail.es, @hotmail.de, @hotmail.it, @live.com, @msn.com, and @outlook.com.
Yes. Both @hotmail.com, @live.com, @msn.com and @outlook.com run on Microsoft’s consumer mail infrastructure, and our verifier checks all of them as well as business domains on Microsoft 365.
Microsoft converts long-abandoned @hotmail.com and @live.com addresses into pristine spam traps. Hitting even a small number of these traps can get your sending domain blocked across all Microsoft 365 recipients.
We probe the *.mail.protection.outlook.com server with a randomized control address alongside the target address to determine whether the tenant accepts all mail (Catch-All / Risky) or validates individual recipients.