Learn email concepts

Defines which servers can send email on behalf of the domain.

Digital signature that proves email authenticity.

Policy that tells receivers what to do on failed authentication.

Looking up domain name for an IP address.

Score indicating email spam probability.

Blocklists containing known spam-sending IP addresses.

Returning undeliverable email to sender.

Trustworthiness score of sending domain and IP.

DNS record specifying domain's mail server.

SMTP command where the sending server introduces itself.

Standard protocol for sending email.

Two different 'from' and 'to' information in email.

Bounce recipient and SPF check basis.

Encrypted connection between email servers.

Authentication chain for forwarded emails.

Display brand logo in incoming emails.