BIMI (Brand Indicators for Message Identification) allows brands to display their logo alongside authenticated emails, enhancing brand recognition and trust. To use BIMI, ensure your domain is authenticated with SPF, DKIM, and DMARC, and publish a BIMI record in your DNS settings. ARC (Authenticated Received Chain) is designed to preserve email authentication results across multiple hops, useful for forwarded emails. Implementing ARC involves configuring your email server to add ARC headers to outgoing emails.