Email authentication
Terms about proving who a message is from.
- BIMI
Brand Indicators for Message Identification: a way to show a brand logo beside authenticated messages in supporting mail clients.
- Custom domain (sending)
Your own domain used for sending and for links and images in email, instead of the provider’s shared domain.
- DKIM
DomainKeys Identified Mail: a signature your sending system adds to each message, which receivers check against a public key in DNS.
- DMARC
Domain-based Message Authentication, Reporting and Conformance: a DNS policy that tells receivers what to do with mail that fails SPF and DKIM alignment with your From domain.
- DNS TXT record
A DNS record that holds free-form text.
- Email authentication
Records and signatures (SPF, DKIM, DMARC) that let receivers check a message really came from the domain it claims.
- Email security
Protecting email accounts and messages from abuse.
- Email spoofing
Forging the sender of a message so it appears to come from someone else.
- Return-Path
The address where bounces and delivery notices are sent, also called the envelope sender.
- S/MIME
Secure/Multipurpose Internet Mail Extensions: a way to sign and encrypt email using certificates.
- SPF
Sender Policy Framework: a DNS record listing the servers allowed to send mail for a domain.