For reasons that I cannot disclose right now, but will soon, I recently looked into BIMI. And... I have some concerns. BIMI is a spec built on top of DKIM and DMARC, and allows companies to show a logo beside their emails in supporting frontends (like gmail). It requires purchasing a very expensive certificate, I think the justification for it is dubious, and I am not a fan. But even if we put that aside, it's also very strange on a technical level. 🧵
