Product6 min read

Gmail folder detection — exactly where you land

Primary, Promotions, Updates, Social, or Spam. Not “inbox vs spam” — the exact tab.

Every other placement tool reports “inbox” vs “spam” for Gmail. But “inbox” can mean Primary (where it gets read), Promotions (where it gets buried), Updates (transactional), or Social (forgotten). Reply rates differ by 10x between Primary and Promotions.

What we report per Gmail seed
  • Primary / Promotions / Updates / Social / Spam / Unknown.
  • Detected via IMAP label inspection — the actual category Gmail applied.
  • Both consumer Gmail and Google Workspace seeds covered separately.

Why the folder matters more than “inbox”

  • Primary: treated as a real conversation. 2–5x reply rate vs Promotions.
  • Promotions: bulk grouping. Users scroll through in bursts, reply rate low.
  • Updates: transactional. Almost never answered by a cold prospect.
  • Social: platform notifications. Irrelevant for cold outbound.
  • Spam: terminal.

Reporting “Gmail placement: 65%” without folder breakdown hides whether 65% is Primary or Promotions. The business impact is dramatic.

How we detect it

Our Gmail seeds are real mailboxes. When your test email arrives, we read the IMAP labels Gmail assigned (CATEGORY_PERSONAL, CATEGORY_PROMOTIONS, CATEGORY_UPDATES, CATEGORY_SOCIAL, SPAM). That's the ground truth — not an inference.

Workspace vs consumer

Gmail Workspace domains can disable category tabs entirely. We report that case as a separate result so you can see whether your B2B reach is landing in a one-tab Workspace inbox (where categorisation doesn't apply) or in a multi-tab consumer inbox.

See your Gmail folder now

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FAQ

What does 'Unknown' mean?

Gmail applied no category label (Workspace domains with categories disabled, or messages Gmail hadn't yet finished processing). We surface this explicitly instead of guessing.

Can I filter results to show only Primary-eligible seeds?

Yes, in the web UI and via API.

Does Outlook have similar folder breakdown?

Outlook consumer has Focused vs Other — we report both. Enterprise M365 mailbox rules vary by tenant; we report to the extent exposed.
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