Your emails are disappearing into Outlook's junk folder and your ESP's support team is useless. Here's how to diagnose the real problem, find a provider that actually cares, and get your inbox placement back.
You're watching your open rates crater. Customers aren't receiving order confirmations. Your ESP's support team sends you a link to their generic troubleshooting docs for the third time.
Microsoft's junk filters just don't like you right now—and you're stuck.
This isn't a problem you can solve alone, and it's definitely not one your current provider will solve for you. Deliverability isn't a checkbox item to them. It's a revenue problem for you. The gap between those two things is where most e-commerce teams get abandoned.
Let's fix this.
Before you blame yourself, know this: Microsoft's reputation system is notoriously opaque and reactive. Unlike Gmail's ML-based filtering, Outlook relies heavily on complaint rates, bounce patterns, and sender reputation databases. One thing—a spike in bounces, a sudden volume increase, or inherited IP reputation—can torpedo you overnight.
Your current ESP likely won't investigate because they manage thousands of customers. Diagnosing your specific issue takes time and expertise they don't allocate to mid-market accounts.
Start by checking these yourself:
Document everything you find. You'll need this for what's next.
Before you leave, escalate hard—but strategically.
Don't email support. Request a call with their deliverability team or a senior account manager. Say this:
"We're experiencing a sudden placement problem with Microsoft. We need someone to review our sending patterns, authentication setup, and IP history to identify the root cause. Generic docs won't solve this."
A real provider will:
If they refuse or offer another article, you have your answer: they're not equipped to help, and they never will be.
Document this refusal. It matters for the next step.
Not all ESPs are created equal. The ones that treat deliverability as a commodity charge less but help less. The ones that treat it as a core competency charge more—and actually have teams dedicated to it.
You're at the tier where this distinction matters.
When evaluating new providers, ask these questions:
Providers in this category include platforms explicitly built for sophisticated senders: Klaviyo (strong for e-commerce), Klaviyo's competitors like Omnisend, or working with a dedicated email consultant who can audit and rebuild your reputation from scratch.
Yes, this costs more. But the cost of dead email performance is higher.
Once you're with a provider that actually supports you, work with them on a recovery roadmap:
This takes 4-6 weeks. But it works.
This week: Audit your current setup using the checks above. Request a deliverability review from your ESP's human team.
Next week: If they refuse or dodge, start conversations with 2-3 providers known for serious deliverability support. Ask for references from e-commerce companies of your size.
Your email channel is too important to leave in the hands of a platform that treats you like a number. Find a partner, not a vendor.