Quick summary
- Term
- SMTP
- Plain-English definition
- SMTP is the protocol used to send email.
- Technical definition
- SMTP is the protocol used to send email.
- Commonly confused with
- Related domain, DNS, registrar, API, or agent-infrastructure terms.
Definition
SMTP is the protocol used to send email.
Why it matters
Outgoing email depends on correctly configured SMTP servers and authentication.