SPF, DKIM, DMARC & BIMI explained in 30 seconds
SPF
Sender Policy Framework
Specifies which mail servers are authorized to send email from your domain.
DKIM
DomainKeys Identified Mail
Cryptographic signature verifying that email was not altered in transit.
DMARC
Domain-based Message Authentication
Instructs receiving servers what action to take if SPF or DKIM checks fail.
BIMI
Brand Indicators for Message Identification
Displays your brand logo in inboxes like Gmail and Outlook.