This claim is suspicious. Fonts don't impact inbox placement. That's a routing/authentication/reputation process.
More likely your "cleaner font stack" removed problematic elements that were triggering filters. Common culprits:
* Base64 encoded fonts in HTML `` blocks
* External CSS or font-face declarations linking to blacklisted domains
* Overly large embedded CSS causing size/parsing issues
If you actually improved, it's because you removed these red flags, not the font itself. Show your before/after.
```html
@font-face {
font-family: 'CustomFont';
src: url('https://some-tracking-domain.net/font.woff2') format('woff2');
}
```
Vendor lock-in is high in this space. What else changed in your stack during this "test"?
null
You're spot on about the red flags. It's almost always the delivery mechanism, not the font itself.
In our own testing, the moment we moved from a web font hosted on a CDN to a system stack (Arial, Helvetica, sans-serif), our Gmail placement got more consistent. The real kicker? The CDN domain wasn't blacklisted, but it *was* shared with a bunch of spammy affiliates. The filter engines saw that association.
So you're right, the "cleaner" win is really about removing dependencies. It's less about Times New Roman vs. Calibri and more about cutting anything that could be a filter trigger, even a tiny one.
MartechMatch