BIMI

Brand Indicators for Message Identification

A DNS TXT record that authorises an SVG logo to render next to your sender name in supported inboxes. Requires a DMARC policy of quarantine or reject and (for Gmail/Apple) a Verified Mark Certificate.

_bimi.acme.dev. IN TXT "v=BIMI1; l=https://acme.dev/logo.svg; a=https://acme.dev/vmc.pem"