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Deliverability guide

Microsoft SNDS: how to set it up and read it

See how Outlook.com treats email from your own IP addresses: filtering, complaints and spam trap hits.

What SNDS is

Microsoft SNDS (Smart Network Data Services) is a free dashboard showing how Outlook.com, Hotmail and Live see email from IP addresses you control: how much you send, how many people complain, how many emails hit spam traps, and whether Microsoft filters you.

It only covers your own sending IP addresses, such as a dedicated IP or your own mail server. If you send through Google Workspace, Microsoft 365 or a cold email tool on shared servers, SNDS won’t show you anything useful.

How to set it up

1

Go to Microsoft’s sender support site at sendersupport.olc.protection.outlook.com/snds/ and sign in with a Microsoft account.

2

Request access for your IP address or range.

3

Confirm you control it. Microsoft emails an address linked to that IP range, such as the abuse or postmaster contact in its public records. Click the link in that email.

4

Check the data once access is granted. It updates daily.

Reading the data

  • Filter result: green means most of your mail is accepted; yellow means some is filtered as spam; red means most is filtered or blocked.
  • Complaint rate: the share of email that Outlook users marked as junk. Keep it well under 0.3%.
  • Trap hits: emails sent to spam trap addresses, a sign of an old or bought list.

If Microsoft is blocking you

Fix the cause first: clean your list, slow down and check your authentication with the full domain scan. Then request delisting through Microsoft’s sender support site. Microsoft also runs a complaint feedback programme (JMRP) on the same site, which sends you a copy of emails Outlook users mark as junk.

Check your authentication first

Microsoft blocks domains without SPF, DKIM and DMARC long before reputation matters.

Run the blacklist check