Symptoms#
- Messages landing in spam despite previously good placement
- Bounces mentioning policy, authentication, or reputation
- Provider dashboards showing a drop in reputation or authentication pass rate
Diagnosis steps#
- Confirm the configuration is live: query DNS from an external resolver and check the sending platform's settings page.
- Send to a seed mailbox and read the full headers, especially Authentication-Results.
- Compare the domains in From, Return-Path, and DKIM d= for alignment.
- Check provider dashboards (Google Postmaster Tools, Microsoft SNDS) for reputation and error rates.
- Review recent changes: new vendors, DNS edits, list imports, volume spikes.
Likely causes#
- Transparent backgrounds, which render unpredictably on dark-mode clients.
- Text elements that rely on fonts; convert text to outlines.
Fix and re-verify#
- 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.