Providers reject non-conforming files silently. A valid file is the difference between a logo appearing or not.
The metrics that matter#
- Authentication pass rate: share of mail passing SPF, DKIM, and DMARC alignment. Healthy: 99% or higher.
- Spam complaint rate: Gmail enforces at 0.3%; stay under 0.1%.
- Hard bounce rate: under 2%; above 5% triggers platform reviews.
- Inbox placement: above 90% across major providers via seed tests.
- Engagement: click and reply rates by segment; opens are unreliable after Mail Privacy Protection.
Where to read them#
- Google Postmaster Tools for Gmail domain reputation, spam rate, and authentication.
- Microsoft SNDS and JMRP for Outlook.com IP reputation and complaints.
- Your ESP's delivery and bounce reports.
- DMARC aggregate reports for authentication by source.
Improving the numbers#
- Export a square SVG with the logo centered and a solid background color.
- Set baseProfile="tiny-ps" and version="1.2" on the root svg element.
- Add a <title> element matching your brand name.
- Remove all script, filter, and external href references, and strip x/y attributes from the root.
- Validate with a BIMI SVG converter and keep the file under 32 KB.
Frequently asked questions#
Why does my SVG fail validation?
Most commonly a missing baseProfile attribute, embedded images, or leftover editor metadata. Run it through a converter that outputs the Tiny PS profile.