Microsoft Deliverability Blueprint

I'm sharing our secret sauce our clients get 5-15% reply rates on Microsoft contacts.

90% of your emails to Microsoft recipients never land.

Even if your copy is perfect. Even if your offer is great.

They just don't see it.

We cracked it đź§™ 

Here's why this matters:

The bigger the company you're targeting, the more likely they use Microsoft.

  • SMBs: 90% Google, 10% Microsoft

  • Mid-market: 70/30

  • Enterprise: Often 50/50 or Microsoft-heavy

If you're selling upmarket, you're losing half your pipeline due to the deliverability.

How we’ve cracked Microsoft’s Algo

15,000+ mailboxes managed. 300+ B2B teams.

Our clients get 5-12% reply rates on Microsoft-only audiences.

Here's the blueprint:

1. Analyze your ESP mix Use MX Toolbox (free) to see what % of your audience is on Microsoft.

2. Build separate infrastructure Microsoft needs its own setup. Don't mix it with Google.

3. Azure SMTP + Enterprise IP Not Google mailboxes. Not Outlook. Azure SMTP with enterprise-level IP.

4. The ratios

  • 1 domain = 10 mailboxes

  • 5 emails/day per mailbox

  • That's 50 emails/day per domain

5. Premium warm-up Outlook-specific pools. 3 weeks minimum. Cheap warm-up = ruined deliverability.

6. Rotation buffer Keep 10-30% extra domains warming. When one burns, swap immediately.

7. Clean copy No links. No HTML. No tracking pixels. Plain text only.

8. Monitor the 96% threshold Inbox placement drops below 96%? Rotate that domain.

❌ Who this is NOT for:

If you're only targeting startups and SMBs, Google optimization is usually enough. Skip this.

âś… Who this IS for:

Anyone selling to mid-market or enterprise where Microsoft usage is 30%+. This is the difference between replies and radio silence.

Quick reminder:

We build and operate this infrastructure for B2B teams.

You own the ICP and copy. We own deliverability.

If you want us to handle this for you → [reply to this email] or book a call

— Ilya

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