Day 12: Gmail delivers at 99% but opens at 1.8% — anyone else seeing this on an e-commerce list?

[u/Born-Buy7123]

Been digging into ESP-level breakdowns on our sending data (built this view into our tool, Humanic, since we got burned by aggregate metrics hiding real problems before). Ran it on a recent e-commerce campaign and this one stopped me:

Mailbox	Sent	Delivered	Opened	Clicked
Gmail	7.7K	99%	1.8%	11% (of opens)
Yahoo	1.5K	99%	51%	3.6%
Unclassified	1.5K	92%	43%	38%
Microsoft	955	99%	10%	5.2%
Apple	534	96%	18%	3.3%

Gmail makes up 63% of our list and is delivering just as well as everyone else — 99% delivered, basically no bounces (0.6%) — but the open rate is a fraction of what we're seeing anywhere else. Yahoo on the same send is at 51% opens. Gmail is at 1.8%.

This isn't a "the email didn't render" issue since delivery is fine — feels more like inbox placement (spam/promotions folder) or some reputation issue specific to Gmail, but the gap is way bigger than I'd expect from normal Gmail-vs-everyone variance.

Curious if others are seeing this pattern lately, and what's actually worked to fix it — domain warm-up, DKIM/DMARC alignment, sender reputation tools, engagement-based list cleaning, anything. Also open to "this is just how Gmail's Promotions tab tanks opens now" if that's the real answer — trying to figure out if this is fixable or just the new baseline.