What actually pushes a message toward Promotions
- High image-to-text ratio. A template that's mostly one large hero image with little real text reads as a marketing blast, even if the copy itself is fine.
- Marketing-shaped structure: a big banner, a single CTA button, a coupon-code block. The classifier has seen millions of real promotional emails and these are their fingerprints.
- Tracking-heavy links: lots of distinct tracking domains, redirect chains, or UTM-stuffed URLs in a single message.
- Bulk-sending patterns at the account level (send volume, list size, engagement rate), outside any single template's control, but real.
The myth that trips people up
"Has an unsubscribe link" is not on that list. An unsubscribe link is legally required for marketing mail (CAN-SPAM, GDPR) and Gmail expects to see one on real marketing. Removing it does not make an email read as more "Primary," it just makes it non-compliant.
What to actually check before you send
- Real text-to-image ratio: if a screen reader would see almost nothing, so does the classifier.
- Link count and where those links point: a dozen different tracking subdomains is a stronger signal than a dozen links to the same domain.
- Whether the template reads as a 1:1 reply to something the recipient did (a receipt, a confirmation) versus a blast: transactional mail gets much more lenient treatment across the board.
- Per-client behavior, not just Gmail: Promotions tabs are a Gmail-only concept; Outlook, Apple Mail, and Yahoo don't have an equivalent, so the same template can behave completely differently across providers.
This is exactly what Faulterly's per-ESP inbox-placement prediction is for: it looks at the template's real signals (not a guess from subject line alone) and tells you which tab or folder it's likely to land in per client, before you've sent a single real email to find out the hard way.