What’s the best way to benchmark performance by region or provider?

Your average open rate looks fine. But when you dig in, you notice Gmail subscribers barely engage while your Yahoo audience opens everything. Or your European list is solid but deliverability in Asia looks rough. This is exactly why benchmarking by region and provider matters.

Global averages are comfortable lies. They blend very different audiences together and hide where you're actually struggling.

Start with provider segmentation

The first split to make is by mailbox provider. At minimum, track these separately:

• Gmail (dominant in the US, growing globally)
• Outlook / Microsoft 365 (B2B heavy, corporate inboxes)
• Yahoo Mail (strong in the US, also covers AOL domains)
• Apple Mail (note that MPP makes open rates unreliable here)

If you send internationally, you'll also want eyes on regional providers like GMX and Web.de in Germany, Mail.ru in Russia, Orange and Free in France, or Naver in South Korea. These aren't exotic edge cases if that's where your audience lives.

The metrics that matter per segment

For each provider or region, you want to track the same core set so you can compare apples to apples:

• Delivery rate (did the email reach the server at all)
• Inbox vs. spam placement (did it land where it should)
• Open rate (with the caveat that Apple Mail inflates this)
• Click rate (more reliable signal of real engagement)
• Spam complaint rate (per provider if your ESP surfaces it)

Most ESPs let you slice your reporting by domain or custom segment. If yours doesn't expose this natively, export your data and group it yourself by recipient domain. It's a bit manual, but a simple spreadsheet gets you there.

How to actually compare

So once you have provider-level numbers, compare them in two directions. First, compare each provider against your own historical baseline (is Gmail down from last quarter?). Second, compare against industry benchmarks for that provider (are your Gmail open rates lower than the industry average for your vertical?).

When you spot a gap, ask what's different. Lower engagement in one region might mean the content isn't relevant there. Worse placement at one provider might mean your authentication setup has a provider-specific issue. A sudden drop at Microsoft often points to a content or reputation problem with their filtering. Each anomaly is a clue, not a catastrophe.

If resources are tight, prioritize the provider where the most of your audience lives. Fix the biggest problem first, then layer in the others over time.

Not sure how to read what you're seeing? Our SOS hotline is free and we're happy to walk through the numbers with you.