You’ve read the deliverability guides. Somewhere in there, someone tells you to “just check Microsoft SNDS.”

So you go and sign up. And you hit a wall almost immediately — because Microsoft won’t just hand you the data. It wants to confirm you own the IP address you’re sending from.

And here’s the bit nobody warns you about: most recruitment agencies don’t own their sending IPs. Not even close.

What SNDS actually is

Microsoft SNDS (Smart Network Data Services) in one sentence: it’s a free Microsoft tool that shows you how your sending IP addresses are performing against Outlook, Hotmail and Live accounts — spam complaint rates, trap hits, filtering results, the lot.

Why it matters: if a decent slice of your candidates and clients are on Outlook or Hotmail (and in UK recruitment, plenty are), SNDS is one of the only places you can see, in black and white, how Microsoft’s filters actually feel about your mail. Green, yellow, red — no guessing.

Sounds great. There’s just one problem standing between you and that dashboard.

The catch: you have to prove you own the IP

Microsoft doesn’t verify SNDS access by asking nicely. It checks the WHOIS record for the IP address you’re trying to register, finds the registered abuse contact for that IP block, and sends the verification email there. Only whoever controls that inbox can approve access.

That’s fine if you run your own mail servers on IP space registered to your business. It’s a non-starter if you don’t.

Reality Check: “I’ve got a dedicated IP, so I should be able to get SNDS access.” Not necessarily. A dedicated IP from your ESP or CRM provider is dedicated to you in the sense that nobody else sends from it — but you don’t own it. The IP block is still registered to the provider. Microsoft’s verification email goes to their abuse contact, not yours.

And if you’re on a shared IP — which is where most smaller recruitment sending setups land by default — access to that IP’s data may not be available to you at all, because you’d effectively be asking to see reputation data for every other business sharing the block.

So who can actually use SNDS?

Realistically, three groups:

Businesses that own their own IP ranges outright — their own ASN, their own network, registered in their own name. Mostly large enterprises and, notably, email service providers themselves.
Large senders whose ESP is willing to delegate access — some providers will approve an SNDS request on your behalf if you send enough volume to justify the admin. It happens, but it’s a favour, not a right.
Everyone else — locked out, because the IP isn’t theirs and nobody’s delegating.

If you only do one thing today: find out who actually owns the IP address your recruitment CRM or ATS sends from. Ask your provider directly — “do we own this IP, or is it yours?” The answer tells you instantly whether SNDS is even on the table.

Most recruitment agencies use a CRM or ATS (Bullhorn, Crelate, and similar platforms) that routes email through the provider’s own shared or “dedicated-but-rented” infrastructure. That’s convenient for sending. It’s exactly what locks you out of SNDS.

What good looks like instead

If SNDS isn’t available to you, you’re not without options — you’re just looking in a different place.

Google Postmaster Tools is the closer equivalent for Gmail and Workspace recipients, and it authenticates by domain rather than by IP ownership, which is a much lower bar for most agencies to clear.
Domain-level authentication — SPF, DKIM, DMARC — gives receiving mail servers (Microsoft included) a reason to trust your mail regardless of whose IP it travels over. This is the lever you actually control.
Bounce and complaint patterns from your own sending platform will often tell you the same underlying story SNDS would — you just have to go and read them instead of waiting for a dashboard to hand it to you.

Watch-outs:

Don’t assume “no SNDS access” means “no reputation problem.” It just means you’re reading the signals somewhere else.
Don’t chase SNDS access as a project. If your provider can’t or won’t delegate it, that’s an answer — move on to what you can control.
Don’t confuse SNDS (Outlook/Hotmail/Live) with Microsoft 365 enterprise filtering. They’re related, but SNDS won’t tell you anything about mail landing in corporate 365 inboxes.

FAQs

Can I get Microsoft SNDS access through my CRM or ATS? Only if your provider owns the IP and is willing to request access for you. Most won’t, because it means opening up reputation data tied to infrastructure they manage for many clients at once.

What’s the difference between SNDS and Google Postmaster Tools? SNDS verifies by IP ownership through WHOIS. Postmaster Tools verifies by domain, using DNS records you can usually add yourself. That’s the practical reason Postmaster Tools is accessible to far more businesses.

If I can’t get SNDS, does that mean I can’t monitor my Outlook deliverability at all? No. You won’t get Microsoft’s own filtering signals directly, but engagement data, bounce patterns, and clean SPF/DKIM/DMARC setup still tell you most of what you need to know.

Is SNDS worth chasing for a small or mid-sized recruitment agency? Usually not as a first move. It’s a nice-to-have if your infrastructure happens to qualify. It’s not a foundation to build a deliverability strategy on, because most agencies will never get access.

Does owning a “dedicated IP” from my email platform count as owning the IP? No. Dedicated means exclusive use, not ownership. The IP block is still registered to the platform, and that’s whose abuse contact Microsoft emails.

Where this leaves you

SNDS is a genuinely useful tool — for the businesses that can actually get into it. For most recruitment agencies, chasing it is a detour. The more useful question isn’t “how do I get SNDS access?” It’s “who owns the infrastructure I’m sending from, and what does that mean for every part of my reputation — not just this one dashboard?”

That’s usually where the real problem is hiding.

Not sure whether your setup would even qualify, or where your actual reputation issue sits? Book a call with me and we’ll figure it out.