Are my emails really reaching inboxes? Looking for deliverability tools + benchmarks

Marketing & Content Hub Email Deliverability
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Hi @GMartin33

Short answer: you can’t reliably know “primary inbox vs spam/promotions” from standard campaign metrics alone. Opens/clicks tell you what happened after delivery, but not where the message landed. To monitor that well, use a mix of inbox placement testing, sender-reputation monitoring, and engagement/list-health tracking.

1) How to tell if emails are landing in primary vs spam/promotions

Best practice stack

  • Inbox placement testing tools use seed accounts across Gmail, Outlook, Yahoo, etc. to show whether your email hit Primary, Promotions, Spam, or didn’t arrive.
  • Google Postmaster Tools are especially useful for Gmail reputation and spam-rate monitoring; HubSpot specifically notes Gmail spam report data isn’t available in HubSpot, so Postmaster Tools is the recommended source for that.
  • In HubSpot, the Email Health / Integrity view helps monitor deliverability trends like opens, clicks, hard bounces, unsubscribes, spam reports, and an overall score, plus recommendations and high-/low-performing emails or segments.

Important caveat

  • Open rate is no longer a clean proxy for inbox placement, because Apple Mail Privacy Protection can inflate opens. More reliable indicators are CTR, click-to-open rate, conversions, spam complaints, bounce rate, and inbox placement tests.

2) Tools/techniques I’d recommend

For inbox placement / spam monitoring

  • Google Postmaster Tools for Gmail reputation and spam trends.
  • Seed-list/inbox placement tools such as GlockApps, Validity Everest, and similar deliverability platforms if you want direct Primary/Promotions/Spam visibility across providers.

For HubSpot-native monitoring

  • Use the marketing email health/performance views to track:

    • opens
    • clicks
    • hard bounces
    • unsubscribes
    • spam reports
    • engagement over time
    • email-client breakdowns
    • performance by campaign, workflow, or segment where available

  • HubSpot also supports industry benchmarks in the email health area for some industries, and email insights can compare against a HubSpot benchmark, campaign average, or month-over-month for automations.

For ongoing deliverability hygiene

  • Suppress chronically unengaged recipients; HubSpot explicitly recommends segmenting contacts who were delivered multiple emails but never opened and excluding them from sends.
  • Watch hard bounce, unsubscribe, and spam complaint rates closely, since mailbox providers use poor engagement and negative signals to filter more aggressively.

3) Benchmarking resources I’d actually trust/use

I’d use two layers of benchmarks:

A. Your own platform benchmarks first

  • HubSpot benchmark views and industry benchmark options are the most useful first comparison because they’re directly tied to your sending behavior and campaign context.

B. External industry benchmarks second

Use them directionally, not as absolute targets, because methodologies differ and privacy changes distort opens.

A practical set of benchmark ranges to sense-check against:

  • CTR: around 2–4% is often a healthy B2B range in recent benchmark summaries.
  • CTOR: often more useful than opens; recent summaries put B2B-style CTOR roughly around 8–12%.
  • Bounce rate: keeping it below ~2% is a reasonable health threshold in benchmark reports.
  • Unsubscribe rate: generally well under 0.5% is healthier; many benchmark summaries show much lower norms.

4) The metrics I’d prioritize in 2026

If you want a sane scorecard, I’d track:

  1. Inbox placement rate via seed tests
  2. Spam complaint rate and Gmail reputation via Postmaster Tools
  3. Hard bounce rate
  4. CTR
  5. CTOR as a better content-quality metric than raw opens in an MPP world
  6. Conversions / pipeline / revenue per send where possible, not just engagement

Regards